Merge pull request #11089 from matplotlib/auto-backport-of-pr-11083

jklymak · web-flow · commit 37cd83f15ffd · 2018-04-19T10:10:41.000-07:00
Backport PR #11083 on branch v2.2.2-doc
diff --git a/examples/pie_and_polar_charts/pie_demo2.py b/examples/pie_and_polar_charts/pie_demo2.py
@@ -3,60 +3,44 @@
 Pie Demo2
 =========
 
-Make a pie charts of varying size - see
-https://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.pie for the
-docstring.
-
-This example shows a basic pie charts with labels optional features,
-like autolabeling the percentage, offsetting a slice with "explode"
-and adding a shadow, in different sizes.
+Make a pie charts using :meth:`.Axes.pie`.
 
+This example demonstrates some pie chart features like labels, varying size,
+autolabeling the percentage, offsetting a slice and adding a shadow.
 """
+
 import matplotlib.pyplot as plt
-from matplotlib.gridspec import GridSpec
 
 # Some data
-
 labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
 fracs = [15, 30, 45, 10]
 
-explode = (0, 0.05, 0, 0)
-
-# Make square figures and axes
-
-the_grid = GridSpec(2, 2)
-
-plt.subplot(the_grid[0, 0], aspect=1)
-
-plt.pie(fracs, labels=labels, autopct='%1.1f%%', shadow=True)
-
-plt.subplot(the_grid[0, 1], aspect=1)
-
-plt.pie(fracs, explode=explode, labels=labels, autopct='%.0f%%', shadow=True)
-
-plt.subplot(the_grid[1, 0], aspect=1)
-
-patches, texts, autotexts = plt.pie(fracs, labels=labels,
-                                    autopct='%.0f%%',
-                                    shadow=True, radius=0.5)
-
-# Make the labels on the small plot easier to read.
-for t in texts:
-    t.set_size('smaller')
-for t in autotexts:
-    t.set_size('x-small')
-autotexts[0].set_color('y')
-
-plt.subplot(the_grid[1, 1], aspect=1)
-
-# Turn off shadow for tiny plot with exploded slice.
-patches, texts, autotexts = plt.pie(fracs, explode=explode,
-                                    labels=labels, autopct='%.0f%%',
-                                    shadow=False, radius=0.5)
-for t in texts:
-    t.set_size('smaller')
-for t in autotexts:
-    t.set_size('x-small')
-autotexts[0].set_color('y')
+# Make figure and axes
+fig, axs = plt.subplots(2, 2)
+
+# A standard pie plot
+axs[0, 0].pie(fracs, labels=labels, autopct='%1.1f%%', shadow=True)
+
+# Shift the second slice using explode
+axs[0, 1].pie(fracs, labels=labels, autopct='%.0f%%', shadow=True,
+              explode=(0, 0.1, 0, 0))
+
+# Adapt radius and text size for a smaller pie
+patches, texts, autotexts = axs[1, 0].pie(fracs, labels=labels,
+                                          autopct='%.0f%%',
+                                          textprops={'size': 'smaller'},
+                                          shadow=True, radius=0.5)
+# Make percent texts even smaller
+plt.setp(autotexts, size='x-small')
+autotexts[0].set_color('white')
+
+# Use a smaller explode and turn of the shadow for better visibility
+patches, texts, autotexts = axs[1, 1].pie(fracs, labels=labels,
+                                          autopct='%.0f%%',
+                                          textprops={'size': 'smaller'},
+                                          shadow=False, radius=0.5,
+                                          explode=(0, 0.05, 0, 0))
+plt.setp(autotexts, size='x-small')
+autotexts[0].set_color('white')
 
 plt.show()
