Tidy multiple_marks.py

altair/examples/line_chart_with_points.py

@@ -1,24 +1,16 @@
 """
-Line Chart with Points
-----------------------
-This chart shows a simple line chart with points marking each value. Use
-``point=True`` for points with default appearance or customize it with
-``OverlayMarkDef()``.
+Line Chart with Point Markers
+-----------------------------
+This chart shows a simple line chart with points marking each value.
 """
 # category: line charts
 import altair as alt
-import numpy as np
-import pandas as pd
+from vega_datasets import data
 
-x = np.arange(100)
-source = pd.DataFrame({
-  'x': x,
-  'f(x)': np.sin(x / 5)
-})
+source = data.stocks()
 
-alt.Chart(source).mark_line(
-    point=alt.OverlayMarkDef(color="red")
-).encode(
-    x='x',
-    y='f(x)'
+alt.Chart(source).mark_line(point=True).encode(
+    x='date:T',
+    y='price:Q',
+    color='symbol:N'
 )

altair/examples/line_chart_with_points_stroked.py

@@ -0,0 +1,18 @@
+"""
+Line Chart with Stroked Point Markers
+-------------------------------------
+This example shows a simple line chart with points in a different color.
+"""
+# category: line charts
+import altair as alt
+from vega_datasets import data
+
+source = data.stocks()
+
+alt.Chart(source).mark_line(
+    point=alt.OverlayMarkDef(filled=False, fill="white")
+).encode(
+    x='date:T',
+    y='price:Q',
+    color='symbol:N'
+)