Update app.py

app.py

@@ -39,7 +39,7 @@ digraph G2 {
 }
 ''')
 
-
+# Using graph language:
 st.graphviz_chart(''' 
 digraph G {
   rankdir=LR
@@ -105,6 +105,45 @@ digraph R {
 ''')
 
 
+# pydeck example
+
+df = pd.DataFrame(
+    np.random.randn(50, 2) / [50, 50] + [44.9366, 93.6661],
+    columns=['lat', 'lon'])
+
+# 44.9366° N, 93.6661° W
+st.pydeck_chart(pdk.Deck(
+     map_style=None,
+     initial_view_state=pdk.ViewState(
+         latitude=44.9366,
+         longitude=93.6661,
+         zoom=11,
+         pitch=50,
+     ),
+     layers=[
+         pdk.Layer(
+            'HexagonLayer',
+            data=df,
+            get_position='[lon, lat]',
+            radius=200,
+            elevation_scale=4,
+            elevation_range=[0, 1000],
+            pickable=True,
+            extruded=True,
+         ),
+         pdk.Layer(
+             'ScatterplotLayer',
+             data=df,
+             get_position='[lon, lat]',
+             get_color='[200, 30, 0, 160]',
+             get_radius=200,
+         ),
+     ],
+ ))
+
+
+# More graph examples
+
 st.graphviz_chart(''' 
 digraph structs {
     node [shape=record];