practise2b.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Filtering and Sorting"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 1. Import the necessary libraries"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 2. This is the data given as a dictionary"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Create an example dataframe about a fictional army\n",
    "raw_data = {'regiment': ['Nighthawks', 'Nighthawks', 'Nighthawks', 'Nighthawks', 'Dragoons', 'Dragoons', 'Dragoons', 'Dragoons', 'Scouts', 'Scouts', 'Scouts', 'Scouts'],\n",
    "            'company': ['1st', '1st', '2nd', '2nd', '1st', '1st', '2nd', '2nd','1st', '1st', '2nd', '2nd'],\n",
    "            'deaths': [523, 52, 25, 616, 43, 234, 523, 62, 62, 73, 37, 35],\n",
    "            'battles': [5, 42, 2, 2, 4, 7, 8, 3, 4, 7, 8, 9],\n",
    "            'size': [1045, 957, 1099, 1400, 1592, 1006, 987, 849, 973, 1005, 1099, 1523],\n",
    "            'veterans': [1, 5, 62, 26, 73, 37, 949, 48, 48, 435, 63, 345],\n",
    "            'readiness': [1, 2, 3, 3, 2, 1, 2, 3, 2, 1, 2, 3],\n",
    "            'armored': [1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1],\n",
    "            'deserters': [4, 24, 31, 2, 3, 4, 24, 31, 2, 3, 2, 3],\n",
    "            'origin': ['Arizona', 'California', 'Texas', 'Florida', 'Maine', 'Iowa', 'Alaska', 'Washington', 'Oregon', 'Wyoming', 'Louisana', 'Georgia']}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 3. Create a dataframe and assign it to a variable called army. \n",
    "\n",
    "#### Don't forget to include the columns names in the order presented in the dictionary ('regiment', 'company', 'deaths'...) so that the column index order is consistent with the solutions. If omitted, pandas will order the columns alphabetically."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "army = pd.DataFrame(raw_data)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<style scoped>\n",
       "    .dataframe tbody tr th:only-of-type {\n",
       "        vertical-align: middle;\n",
       "    }\n",
       "\n",
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       "    }\n",
       "\n",
       "    .dataframe thead th {\n",
       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "      <th>origin</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "      <td>Arizona</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "      <td>California</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "      <td>Texas</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "      <td>Florida</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>43</td>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "      <td>Maine</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "     regiment company  deaths  battles  size  veterans  readiness  armored  \\\n",
       "0  Nighthawks     1st     523        5  1045         1          1        1   \n",
       "1  Nighthawks     1st      52       42   957         5          2        0   \n",
       "2  Nighthawks     2nd      25        2  1099        62          3        1   \n",
       "3  Nighthawks     2nd     616        2  1400        26          3        1   \n",
       "4    Dragoons     1st      43        4  1592        73          2        0   \n",
       "\n",
       "   deserters      origin  \n",
       "0          4     Arizona  \n",
       "1         24  California  \n",
       "2         31       Texas  \n",
       "3          2     Florida  \n",
       "4          3       Maine  "
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 4. Set the 'origin' colum as the index of the dataframe"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "army = army.set_index('origin')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<style scoped>\n",
       "    .dataframe tbody tr th:only-of-type {\n",
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>43</td>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                       \n",
       "Arizona     Nighthawks     1st     523        5  1045         1          1   \n",
       "California  Nighthawks     1st      52       42   957         5          2   \n",
       "Texas       Nighthawks     2nd      25        2  1099        62          3   \n",
       "Florida     Nighthawks     2nd     616        2  1400        26          3   \n",
       "Maine         Dragoons     1st      43        4  1592        73          2   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Arizona           1          4  \n",
       "California        0         24  \n",
       "Texas             1         31  \n",
       "Florida           1          2  \n",
       "Maine             0          3  "
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.head()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 5. Print only the column veterans"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "origin\n",
       "Arizona         1\n",
       "California      5\n",
       "Texas          62\n",
       "Florida        26\n",
       "Maine          73\n",
       "Iowa           37\n",
       "Alaska        949\n",
       "Washington     48\n",
       "Oregon         48\n",
       "Wyoming       435\n",
       "Louisana       63\n",
       "Georgia       345\n",
       "Name: veterans, dtype: int64"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army['veterans']"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 6. Print the columns 'veterans' and 'deaths'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>veterans</th>\n",
       "      <th>deaths</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>1</td>\n",
       "      <td>523</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>5</td>\n",
       "      <td>52</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>62</td>\n",
       "      <td>25</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>26</td>\n",
       "      <td>616</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>73</td>\n",
       "      <td>43</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>37</td>\n",
       "      <td>234</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>949</td>\n",
       "      <td>523</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Washington</th>\n",
       "      <td>48</td>\n",
       "      <td>62</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>48</td>\n",
       "      <td>62</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>435</td>\n",
       "      <td>73</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Louisana</th>\n",
       "      <td>63</td>\n",
       "      <td>37</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Georgia</th>\n",
       "      <td>345</td>\n",
       "      <td>35</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "            veterans  deaths\n",
       "origin                      \n",
       "Arizona            1     523\n",
       "California         5      52\n",
       "Texas             62      25\n",
       "Florida           26     616\n",
       "Maine             73      43\n",
       "Iowa              37     234\n",
       "Alaska           949     523\n",
       "Washington        48      62\n",
       "Oregon            48      62\n",
       "Wyoming          435      73\n",
       "Louisana          63      37\n",
       "Georgia          345      35"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[['veterans', 'deaths']]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 7. Print the name of all the columns."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Index(['regiment', 'company', 'deaths', 'battles', 'size', 'veterans',\n",
       "       'readiness', 'armored', 'deserters'],\n",
       "      dtype='object')"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.columns"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 8. Select the 'deaths', 'size' and 'deserters' columns from Maine and Alaska"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
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       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>deaths</th>\n",
       "      <th>size</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>43</td>\n",
       "      <td>1592</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>523</td>\n",
       "      <td>987</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "        deaths  size  deserters\n",
       "origin                         \n",
       "Maine       43  1592          3\n",
       "Alaska     523   987         24"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[['deaths', 'size', 'deserters']][(army.index == 'Maine') | (army.index == 'Alaska')]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 9. Select the rows 3 to 7 and the columns 3 to 6"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>7</td>\n",
       "      <td>1006</td>\n",
       "      <td>37</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>8</td>\n",
       "      <td>987</td>\n",
       "      <td>949</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "         battles  size  veterans\n",
       "origin                          \n",
       "Florida        2  1400        26\n",
       "Maine          4  1592        73\n",
       "Iowa           7  1006        37\n",
       "Alaska         8   987       949"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.iloc[3:7, 3:6]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 10. Select every row after the fourth row"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
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       "    .dataframe tbody tr th:only-of-type {\n",
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       "    }\n",
       "\n",
       "    .dataframe thead th {\n",
       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>43</td>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>234</td>\n",
       "      <td>7</td>\n",
       "      <td>1006</td>\n",
       "      <td>37</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>523</td>\n",
       "      <td>8</td>\n",
       "      <td>987</td>\n",
       "      <td>949</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Washington</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>849</td>\n",
       "      <td>48</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>62</td>\n",
       "      <td>4</td>\n",
       "      <td>973</td>\n",
       "      <td>48</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>73</td>\n",
       "      <td>7</td>\n",
       "      <td>1005</td>\n",
       "      <td>435</td>\n",
       "      <td>1</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Louisana</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>37</td>\n",
       "      <td>8</td>\n",
       "      <td>1099</td>\n",
       "      <td>63</td>\n",
       "      <td>2</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Georgia</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>35</td>\n",
       "      <td>9</td>\n",
       "      <td>1523</td>\n",
       "      <td>345</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "            regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                     \n",
       "Maine       Dragoons     1st      43        4  1592        73          2   \n",
       "Iowa        Dragoons     1st     234        7  1006        37          1   \n",
       "Alaska      Dragoons     2nd     523        8   987       949          2   \n",
       "Washington  Dragoons     2nd      62        3   849        48          3   \n",
       "Oregon        Scouts     1st      62        4   973        48          2   \n",
       "Wyoming       Scouts     1st      73        7  1005       435          1   \n",
       "Louisana      Scouts     2nd      37        8  1099        63          2   \n",
       "Georgia       Scouts     2nd      35        9  1523       345          3   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Maine             0          3  \n",
       "Iowa              1          4  \n",
       "Alaska            0         24  \n",
       "Washington        1         31  \n",
       "Oregon            0          2  \n",
       "Wyoming           0          3  \n",
       "Louisana          1          2  \n",
       "Georgia           1          3  "
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.iloc[4:, :]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 11. Select every row up to the 4th row"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<style scoped>\n",
       "    .dataframe tbody tr th:only-of-type {\n",
       "        vertical-align: middle;\n",
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       "\n",
       "    .dataframe tbody tr th {\n",
       "        vertical-align: top;\n",
       "    }\n",
       "\n",
       "    .dataframe thead th {\n",
       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                       \n",
       "Arizona     Nighthawks     1st     523        5  1045         1          1   \n",
       "California  Nighthawks     1st      52       42   957         5          2   \n",
       "Texas       Nighthawks     2nd      25        2  1099        62          3   \n",
       "Florida     Nighthawks     2nd     616        2  1400        26          3   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Arizona           1          4  \n",
       "California        0         24  \n",
       "Texas             1         31  \n",
       "Florida           1          2  "
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.iloc[:4]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 12. Select the 3rd column up to the 7th column"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
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       "    .dataframe tbody tr th:only-of-type {\n",
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       "\n",
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       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
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       "      <th></th>\n",
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       "      <th></th>\n",
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       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>7</td>\n",
       "      <td>1006</td>\n",
       "      <td>37</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>8</td>\n",
       "      <td>987</td>\n",
       "      <td>949</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Washington</th>\n",
       "      <td>3</td>\n",
       "      <td>849</td>\n",
       "      <td>48</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>4</td>\n",
       "      <td>973</td>\n",
       "      <td>48</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>7</td>\n",
       "      <td>1005</td>\n",
       "      <td>435</td>\n",
       "      <td>1</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Louisana</th>\n",
       "      <td>8</td>\n",
       "      <td>1099</td>\n",
       "      <td>63</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Georgia</th>\n",
       "      <td>9</td>\n",
       "      <td>1523</td>\n",
       "      <td>345</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "            battles  size  veterans  readiness\n",
       "origin                                        \n",
       "Arizona           5  1045         1          1\n",
       "California       42   957         5          2\n",
       "Texas             2  1099        62          3\n",
       "Florida           2  1400        26          3\n",
       "Maine             4  1592        73          2\n",
       "Iowa              7  1006        37          1\n",
       "Alaska            8   987       949          2\n",
       "Washington        3   849        48          3\n",
       "Oregon            4   973        48          2\n",
       "Wyoming           7  1005       435          1\n",
       "Louisana          8  1099        63          2\n",
       "Georgia           9  1523       345          3"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army.iloc[:, 3:7]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 13. Select rows where df.deaths is greater than 50"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
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       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
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       "      <th></th>\n",
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       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
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       "      <td>1</td>\n",
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       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>234</td>\n",
       "      <td>7</td>\n",
       "      <td>1006</td>\n",
       "      <td>37</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>523</td>\n",
       "      <td>8</td>\n",
       "      <td>987</td>\n",
       "      <td>949</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Washington</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>849</td>\n",
       "      <td>48</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>62</td>\n",
       "      <td>4</td>\n",
       "      <td>973</td>\n",
       "      <td>48</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>73</td>\n",
       "      <td>7</td>\n",
       "      <td>1005</td>\n",
       "      <td>435</td>\n",
       "      <td>1</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                       \n",
       "Arizona     Nighthawks     1st     523        5  1045         1          1   \n",
       "California  Nighthawks     1st      52       42   957         5          2   \n",
       "Florida     Nighthawks     2nd     616        2  1400        26          3   \n",
       "Iowa          Dragoons     1st     234        7  1006        37          1   \n",
       "Alaska        Dragoons     2nd     523        8   987       949          2   \n",
       "Washington    Dragoons     2nd      62        3   849        48          3   \n",
       "Oregon          Scouts     1st      62        4   973        48          2   \n",
       "Wyoming         Scouts     1st      73        7  1005       435          1   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Arizona           1          4  \n",
       "California        0         24  \n",
       "Florida           1          2  \n",
       "Iowa              1          4  \n",
       "Alaska            0         24  \n",
       "Washington        1         31  \n",
       "Oregon            0          2  \n",
       "Wyoming           0          3  "
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[army['deaths']>50]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 14. Select rows where df.deaths is greater than 500 or less than 50"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
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       "\n",
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       "    }\n",
       "\n",
       "    .dataframe thead th {\n",
       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Maine</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>43</td>\n",
       "      <td>4</td>\n",
       "      <td>1592</td>\n",
       "      <td>73</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Iowa</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>1st</td>\n",
       "      <td>234</td>\n",
       "      <td>7</td>\n",
       "      <td>1006</td>\n",
       "      <td>37</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Alaska</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>523</td>\n",
       "      <td>8</td>\n",
       "      <td>987</td>\n",
       "      <td>949</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Washington</th>\n",
       "      <td>Dragoons</td>\n",
       "      <td>2nd</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>849</td>\n",
       "      <td>48</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>62</td>\n",
       "      <td>4</td>\n",
       "      <td>973</td>\n",
       "      <td>48</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>73</td>\n",
       "      <td>7</td>\n",
       "      <td>1005</td>\n",
       "      <td>435</td>\n",
       "      <td>1</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Louisana</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>37</td>\n",
       "      <td>8</td>\n",
       "      <td>1099</td>\n",
       "      <td>63</td>\n",
       "      <td>2</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Georgia</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>35</td>\n",
       "      <td>9</td>\n",
       "      <td>1523</td>\n",
       "      <td>345</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                       \n",
       "Arizona     Nighthawks     1st     523        5  1045         1          1   \n",
       "California  Nighthawks     1st      52       42   957         5          2   \n",
       "Texas       Nighthawks     2nd      25        2  1099        62          3   \n",
       "Florida     Nighthawks     2nd     616        2  1400        26          3   \n",
       "Maine         Dragoons     1st      43        4  1592        73          2   \n",
       "Iowa          Dragoons     1st     234        7  1006        37          1   \n",
       "Alaska        Dragoons     2nd     523        8   987       949          2   \n",
       "Washington    Dragoons     2nd      62        3   849        48          3   \n",
       "Oregon          Scouts     1st      62        4   973        48          2   \n",
       "Wyoming         Scouts     1st      73        7  1005       435          1   \n",
       "Louisana        Scouts     2nd      37        8  1099        63          2   \n",
       "Georgia         Scouts     2nd      35        9  1523       345          3   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Arizona           1          4  \n",
       "California        0         24  \n",
       "Texas             1         31  \n",
       "Florida           1          2  \n",
       "Maine             0          3  \n",
       "Iowa              1          4  \n",
       "Alaska            0         24  \n",
       "Washington        1         31  \n",
       "Oregon            0          2  \n",
       "Wyoming           0          3  \n",
       "Louisana          1          2  \n",
       "Georgia           1          3  "
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[(army['deaths']>500) | army['deaths']<50]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 15. Select all the regiments not named \"Dragoons\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
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       "    }\n",
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       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
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       "    <tr>\n",
       "      <th>origin</th>\n",
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       "      <th></th>\n",
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       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>California</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>52</td>\n",
       "      <td>42</td>\n",
       "      <td>957</td>\n",
       "      <td>5</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>24</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Florida</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>616</td>\n",
       "      <td>2</td>\n",
       "      <td>1400</td>\n",
       "      <td>26</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Oregon</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>62</td>\n",
       "      <td>4</td>\n",
       "      <td>973</td>\n",
       "      <td>48</td>\n",
       "      <td>2</td>\n",
       "      <td>0</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Wyoming</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>1st</td>\n",
       "      <td>73</td>\n",
       "      <td>7</td>\n",
       "      <td>1005</td>\n",
       "      <td>435</td>\n",
       "      <td>1</td>\n",
       "      <td>0</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Louisana</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>37</td>\n",
       "      <td>8</td>\n",
       "      <td>1099</td>\n",
       "      <td>63</td>\n",
       "      <td>2</td>\n",
       "      <td>1</td>\n",
       "      <td>2</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Georgia</th>\n",
       "      <td>Scouts</td>\n",
       "      <td>2nd</td>\n",
       "      <td>35</td>\n",
       "      <td>9</td>\n",
       "      <td>1523</td>\n",
       "      <td>345</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>3</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                       \n",
       "Arizona     Nighthawks     1st     523        5  1045         1          1   \n",
       "California  Nighthawks     1st      52       42   957         5          2   \n",
       "Texas       Nighthawks     2nd      25        2  1099        62          3   \n",
       "Florida     Nighthawks     2nd     616        2  1400        26          3   \n",
       "Oregon          Scouts     1st      62        4   973        48          2   \n",
       "Wyoming         Scouts     1st      73        7  1005       435          1   \n",
       "Louisana        Scouts     2nd      37        8  1099        63          2   \n",
       "Georgia         Scouts     2nd      35        9  1523       345          3   \n",
       "\n",
       "            armored  deserters  \n",
       "origin                          \n",
       "Arizona           1          4  \n",
       "California        0         24  \n",
       "Texas             1         31  \n",
       "Florida           1          2  \n",
       "Oregon            0          2  \n",
       "Wyoming           0          3  \n",
       "Louisana          1          2  \n",
       "Georgia           1          3  "
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[army['regiment'] != 'Dragoons']"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 16. Select the rows called Texas and Arizona"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<style scoped>\n",
       "    .dataframe tbody tr th:only-of-type {\n",
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       "\n",
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       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>regiment</th>\n",
       "      <th>company</th>\n",
       "      <th>deaths</th>\n",
       "      <th>battles</th>\n",
       "      <th>size</th>\n",
       "      <th>veterans</th>\n",
       "      <th>readiness</th>\n",
       "      <th>armored</th>\n",
       "      <th>deserters</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>origin</th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "      <th></th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>Arizona</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>1st</td>\n",
       "      <td>523</td>\n",
       "      <td>5</td>\n",
       "      <td>1045</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>1</td>\n",
       "      <td>4</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>Texas</th>\n",
       "      <td>Nighthawks</td>\n",
       "      <td>2nd</td>\n",
       "      <td>25</td>\n",
       "      <td>2</td>\n",
       "      <td>1099</td>\n",
       "      <td>62</td>\n",
       "      <td>3</td>\n",
       "      <td>1</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "           regiment company  deaths  battles  size  veterans  readiness  \\\n",
       "origin                                                                    \n",
       "Arizona  Nighthawks     1st     523        5  1045         1          1   \n",
       "Texas    Nighthawks     2nd      25        2  1099        62          3   \n",
       "\n",
       "         armored  deserters  \n",
       "origin                       \n",
       "Arizona        1          4  \n",
       "Texas          1         31  "
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[(army.index == 'Texas') | (army.index == 'Arizona')]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 17. Select the third cell in the row named Arizona"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "origin\n",
       "Arizona    523\n",
       "Name: deaths, dtype: int64"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army[army.index == 'Arizona' ].iloc[:, 2]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 18. Select the third cell down in the column named deaths"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "73"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "army['deaths'][-3]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
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