matplotlib · efiring · May 25, 2019 · May 25, 2019
diff --git a/examples/lines_bars_and_markers/barchart.py b/examples/lines_bars_and_markers/barchart.py
@@ -3,64 +3,52 @@
 Grouped bar chart with labels
 =============================
 
-Bar charts are useful for visualizing counts, or summary statistics
-with error bars. This example shows a ways to create a grouped bar chart
-with Matplotlib and also how to annotate bars with labels.
+This example shows a how to create a grouped bar chart and how to annotate
+bars with labels.
 """
 
 import matplotlib
 import matplotlib.pyplot as plt
 import numpy as np
 
 
-men_means, men_std = (20, 35, 30, 35, 27), (2, 3, 4, 1, 2)
-women_means, women_std = (25, 32, 34, 20, 25), (3, 5, 2, 3, 3)
+labels = ['G1', 'G2', 'G3', 'G4', 'G5']
+men_means = [20, 34, 30, 35, 27]
+women_means = [25, 32, 34, 20, 25]
 
-ind = np.arange(len(men_means))  # the x locations for the groups
+x = np.arange(len(labels))  # the label locations
 width = 0.35  # the width of the bars
 
 fig, ax = plt.subplots()
-rects1 = ax.bar(ind - width/2, men_means, width, yerr=men_std,
-                label='Men')
-rects2 = ax.bar(ind + width/2, women_means, width, yerr=women_std,
-                label='Women')
+rects1 = ax.bar(x - width/2, men_means, width, label='Men')
+rects2 = ax.bar(x + width/2, women_means, width, label='Women')
 
 # Add some text for labels, title and custom x-axis tick labels, etc.
 ax.set_ylabel('Scores')
 ax.set_title('Scores by group and gender')
-ax.set_xticks(ind)
-ax.set_xticklabels(('G1', 'G2', 'G3', 'G4', 'G5'))
+ax.set_xticks(x)
+ax.set_xticklabels(labels)
 ax.legend()
 
 
-def autolabel(rects, xpos='center'):
-    """
-    Attach a text label above each bar in *rects*, displaying its height.
-
-    *xpos* indicates which side to place the text w.r.t. the center of
-    the bar. It can be one of the following {'center', 'right', 'left'}.
-    """
-
-    ha = {'center': 'center', 'right': 'left', 'left': 'right'}
-    offset = {'center': 0, 'right': 1, 'left': -1}
-
+def autolabel(rects):
+    """Attach a text label above each bar in *rects*, displaying its height."""
     for rect in rects:
         height = rect.get_height()
         ax.annotate('{}'.format(height),
                     xy=(rect.get_x() + rect.get_width() / 2, height),
-                    xytext=(offset[xpos]*3, 3),  # use 3 points offset
-                    textcoords="offset points",  # in both directions
-                    ha=ha[xpos], va='bottom')
+                    xytext=(0, 3),  # 3 points vertical offset
+                    textcoords="offset points",
+                    ha='center', va='bottom')
 
 
-autolabel(rects1, "left")
-autolabel(rects2, "right")
+autolabel(rects1)
+autolabel(rects2)
 
 fig.tight_layout()
 
 plt.show()
 
-
 #############################################################################
 #
 # ------------