add doc to get started

Author: xiongyihui

01.get_started.ipynb

@@ -0,0 +1,138 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Get started with JupyterLab\n",
+    "\n",
+    "JupyterLab is a web-based interactive development environment for Jupyter notebooks. It allows you to create and share documents that contain live code, equations, visualizations and narrative text. \n",
+    "In this document, you can run python or shell scripts to play sound, plot."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# run python code\n",
+    "import sys\n",
+    "print(sys.version)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# run shell command\n",
+    "!uname -a"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# record audio\n",
+    "!arecord -f S16_LE -c 1 -r 48000 -d 3 -Vmono 48k.wav"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# play audio on the device\n",
+    "!play 48k.wav"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# play audio on the browser\n",
+    "import IPython.display as ipd\n",
+    "ipd.Audio('48k.wav')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# mix python code and shell command\n",
+    "import getpass\n",
+    "\n",
+    "# get password and install matplotlib\n",
+    "password = getpass.getpass()\n",
+    "!echo {password} | sudo -S apt install -y python3-matplotlib python3-scipy"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "import scipy.io.wavfile\n",
+    "\n",
+    "data = scipy.io.wavfile.read('48k.wav')\n",
+    "plt.plot(data[1])\n",
+    "plt.show()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Fixing random state for reproducibility\n",
+    "np.random.seed(19680801)\n",
+    "\n",
+    "# Compute pie slices\n",
+    "N = 20\n",
+    "theta = np.linspace(0.0, 2 * np.pi, N, endpoint=False)\n",
+    "radii = 10 * np.random.rand(N)\n",
+    "width = np.pi / 4 * np.random.rand(N)\n",
+    "colors = plt.cm.viridis(radii / 10.)\n",
+    "\n",
+    "ax = plt.subplot(111, projection='polar')\n",
+    "ax.bar(theta, radii, width=width, bottom=0.0, color=colors, alpha=0.5)\n",
+    "\n",
+    "plt.show()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}