handling of color=None by eventplot(), fixes #3728

alimuldal · alimuldal · commit a2d46ffa6baf · 2014-10-27T12:29:08.000Z
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -1180,8 +1180,11 @@ def eventplot(self, positions, orientation='horizontal', lineoffsets=1,
         if len(linewidths) == 1:
             linewidths = np.tile(linewidths, len(positions))
         if len(colors) == 1:
-            colors = np.asanyarray(colors)
-            colors = np.tile(colors, [len(positions), 1])
+            if colors[0] is None:
+                colors = colors * len(positions)
+            else:
+                colors = np.asanyarray(colors)
+                colors = np.tile(colors, [len(positions), 1])
         if len(linestyles) == 1:
             linestyles = [linestyles] * len(positions)
 
