Update linked-brushing.ipynb

Author: anitagraser

3-tech-demos/linked-brushing.ipynb

@@ -94,7 +94,27 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "map_plot + df.groupby(\"ShipType\").count().hvplot.bar(x=\"ShipType\", y='MMSI', width=400, rot=90)"
+    "bar_plot = df.groupby(\"ShipType\").count().hvplot.bar(x=\"ShipType\", y='MMSI', width=400, rot=90)\n",
+    "map_plot + bar_plot"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def selected_bar_plot(x_range, y_range):\n",
+    "    if x_range:\n",
+    "        tmp = df[(df.x>x_range[0])&(df.x<x_range[1])]\n",
+    "    else:\n",
+    "        tmp = df\n",
+    "    return tmp.groupby(\"ShipType\").count().hvplot.bar(x=\"ShipType\", y='MMSI', width=400, rot=90)\n",
+    "\n",
+    "map_plot = df.hvplot.scatter(x='x', y='y', c=\"ShipType\", width=700, height=300)\n",
+    "rangexy = hv.streams.RangeXY(source=map_plot)\n",
+    "    \n",
+    "map_plot << hv.DynamicMap(selected_bar_plot, streams=[rangexy])"
    ]
   },
   {