Merge pull request #78 from martinRenou/add_ipympl1

Add ipympl notebook

Author: martinRenou

2019-09-4-EuroSciPy-voila/03.ipympl.ipynb

@@ -0,0 +1,98 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# The Matplotlib Jupyter Widget Backend\n",
+    "\n",
+    "Enabling interaction with matplotlib charts in the Jupyter notebook and JupyterLab\n",
+    "\n",
+    "https://github.com/matplotlib/jupyter-matplotlib"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Enabling the `widget` backend.\n",
+    "# This requires jupyter-matplotlib a.k.a. ipympl.\n",
+    "# ipympl can be install via pip or conda.\n",
+    "%matplotlib widget"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import matplotlib.pyplot as plt\n",
+    "import numpy as np"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# When using the `widget` backend from ipympl,\n",
+    "# fig.canvas is a proper Jupyter interactive widget, which can be embedded in\n",
+    "# Layout classes like HBox and Vbox.\n",
+    "\n",
+    "# One can bound figure attributes to other widget values.\n",
+    "\n",
+    "from ipywidgets import HBox, FloatSlider\n",
+    "\n",
+    "plt.ioff()\n",
+    "plt.clf()\n",
+    "\n",
+    "slider = FloatSlider(\n",
+    "    orientation='vertical',\n",
+    "    value=1.0,\n",
+    "    min=0.02,\n",
+    "    max=2.0\n",
+    ")\n",
+    "\n",
+    "fig = plt.figure(3)\n",
+    "\n",
+    "x = np.linspace(0, 20, 500)\n",
+    "\n",
+    "lines = plt.plot(x, np.sin(slider.value  * x))\n",
+    "\n",
+    "def update_lines(change):\n",
+    "    lines[0].set_data(x, np.sin(change.new * x))\n",
+    "    fig.canvas.draw()\n",
+    "    fig.canvas.flush_events()\n",
+    "\n",
+    "slider.observe(update_lines, names='value')\n",
+    "\n",
+    "HBox([slider, fig.canvas])"
+   ]
+  }
+ ],
+ "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": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}