Update linked-brushing.ipynb

Author: anitagraser

3-tech-demos/linked-brushing.ipynb

@@ -29,7 +29,10 @@
     "from holoviews.selection import link_selections\n",
     "from holoviews.operation import gridmatrix\n",
     "from holoviews.operation.element import histogram\n",
-    "from holoviews import opts"
+    "from holoviews import opts\n",
+    "\n",
+    "import warnings\n",
+    "warnings.simplefilter(\"ignore\")"
    ]
   },
   {
@@ -67,7 +70,7 @@
    "outputs": [],
    "source": [
     "gdf.loc[:, 'x'], gdf.loc[:, 'y'] = lnglat_to_meters(gdf.geometry.x, gdf.geometry.y)\n",
-    "df = pd.DataFrame(gdf)"
+    "df = pd.DataFrame(gdf).head(10000)"
    ]
   },
   {
@@ -106,17 +109,39 @@
    "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",
+    "        tmp = df[(df.x > x_range[0]) & (df.x < x_range[1]) & (df.y > y_range[0]) & (df.y < y_range[1])]\n",
     "    else:\n",
     "        tmp = df\n",
-    "    return tmp.groupby(\"ShipType\").count().hvplot.bar(x=\"ShipType\", y='MMSI', width=400, rot=90)\n",
+    "    counts = tmp.groupby(\"ShipType\").count()\n",
+    "    counts = counts.reset_index()\n",
+    "    n_all = counts.MMSI.sum()\n",
+    "    n_max = counts.MMSI.max()\n",
+    "    return counts.hvplot.bar(title=f\"{n_max} records\", x=\"ShipType\", y='MMSI', width=400, height=400, rot=90, color=\"ShipType\", colormap=\"Category20\", ylim=(0,n_max),)\n",
     "\n",
-    "map_plot = df.hvplot.scatter(x='x', y='y', c=\"ShipType\", width=700, height=300)\n",
+    "map_plot = df.hvplot.scatter(title=f\"AIS\", x='x', y='y', c=\"ShipType\", width=700, height=400, colormap=\"Category20\")\n",
     "rangexy = hv.streams.RangeXY(source=map_plot)\n",
     "    \n",
+    "map_plot + hv.DynamicMap(selected_bar_plot, streams=[rangexy])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
     "map_plot << hv.DynamicMap(selected_bar_plot, streams=[rangexy])"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "map_plot + hv.DynamicMap(selected_bar_plot, streams=[rangexy])"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},