Slicing.ipynb

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   "source": [
    "import numpy as np"
   ]
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   "source": [
    "a = np.array([1, 2, 3, 4, 5, 6])"
   ]
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   "source": [
    "two_dim = np.array(([1, 2, 3],\n",
    "          [4, 5, 6], \n",
    "          [7, 8, 9]))"
   ]
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   "source": [
    "### array[start:end:step]"
   ]
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     "text": [
      "[2 3 4]\n"
     ]
    }
   ],
   "source": [
    "# Slice the array a to get the array [2,3,4]\n",
    "sliced_arr = a[1:4]\n",
    "print(sliced_arr)"
   ]
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     "text": [
      "[1 2 3]\n"
     ]
    }
   ],
   "source": [
    "# Slice the array a to get the array [1,2,3]\n",
    "sliced_arr = a[:3]\n",
    "print(sliced_arr)"
   ]
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     "text": [
      "[3 4 5 6]\n"
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   "source": [
    "# Slice the array a to get the array [3,4,5]\n",
    "sliced_arr = a[2:]\n",
    "print(sliced_arr)"
   ]
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   "cell_type": "code",
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     "text": [
      "[1 3 5]\n"
     ]
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   ],
   "source": [
    "# Slice the array a to get the array [1,3,5]\n",
    "sliced_arr = a[::2]\n",
    "print(sliced_arr)"
   ]
  },
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   "cell_type": "code",
   "execution_count": 18,
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     "data": {
      "text/plain": [
       "array([[1, 2, 3],\n",
       "       [4, 5, 6]])"
      ]
     },
     "execution_count": 18,
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   ],
   "source": [
    "# Slice the two_dim array to get the first two rows\n",
    "sliced_arr_1 = two_dim[0:2]\n",
    "sliced_arr_1"
   ]
  },
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   "cell_type": "code",
   "execution_count": 20,
   "id": "c28157ed-4082-4f57-ab13-1393630822f0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[4, 5, 6],\n",
       "       [7, 8, 9]])"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Slice the two_dim array to get the last two rows\n",
    "sliced_arr_1 = two_dim[1:3]\n",
    "sliced_arr_1"
   ]
  },
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     "text": [
      "[2 5 8]\n"
     ]
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   ],
   "source": [
    "# This example uses slice notation to get every row, and then pulls the second column.\n",
    "# Notice how this example combines slice notation with the use of multiple indexes\n",
    "sliced_two_dim_cols = two_dim[:,1]\n",
    "print(sliced_two_dim_cols)"
   ]
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     "text": [
      "Selected Jupyter core packages...\n",
      "IPython          : 8.25.0\n",
      "ipykernel        : 6.28.0\n",
      "ipywidgets       : 8.1.2\n",
      "jupyter_client   : 8.6.0\n",
      "jupyter_core     : 5.5.0\n",
      "jupyter_server   : 2.10.0\n",
      "jupyterlab       : 4.2.3\n",
      "nbclient         : 0.8.0\n",
      "nbconvert        : 7.10.0\n",
      "nbformat         : 5.9.2\n",
      "notebook         : 7.2.1\n",
      "qtconsole        : 5.5.1\n",
      "traitlets        : 5.14.3\n"
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   "source": [
    "!jupyter --version"
   ]
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