Fixed bug affecting the initially selected button

mromanie · web-flow · commit e4842b21741c · 2019-02-06T14:33:43.000+01:00
Fixed a bug that was affecting the initially selected button (line 1038).
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -1035,6 +1035,7 @@ def __init__(self, ax, labels, active=0, activecolor='blue', orientation='vertic
         # in case of horizontal buttons, write them left-to-right
         if orientation == 'horizontal':
             labels.reverse()
+            active = (len(labels) - 1) - active
             
         self.labels = []
         self.circles = []
