matplotlib
diff --git a/‎doc/users/next_whats_new/2017_12_27_sticky_polar_origin.rst
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Lines changed: 8 additions & 0 deletions
diff --git a/‎lib/matplotlib/projections/polar.py
Lines changed: 5 additions & 0 deletions b/‎lib/matplotlib/projections/polar.py
Lines changed: 5 additions & 0 deletions
diff --git a/‎lib/matplotlib/tests/baseline_images/test_axes/markevery_polar.pdf
-2.02 KB b/‎lib/matplotlib/tests/baseline_images/test_axes/markevery_polar.pdf
-2.02 KB
diff --git a/‎lib/matplotlib/tests/baseline_images/test_axes/markevery_polar.png
-2.13 KB b/‎lib/matplotlib/tests/baseline_images/test_axes/markevery_polar.png
-2.13 KB
@@ -0,0 +1,8 @@
+Autoscaling a polar plot snaps to the origin
+--------------------------------------------
+
+Setting the limits automatically in a polar plot now snaps the radial limit
+to zero if the automatic limit is nearby. This means plotting from zero doesn't
+automatically scale to include small negative values on the radial axis.
+
+The limits can still be set manually in the usual way using `set_ylim`.
@@ -717,6 +717,10 @@ class RadialAxis(maxis.YAxis):
     __name__ = 'radialaxis'
     axis_name = 'radius'
 
+    def __init__(self, *args, **kwargs):
+        super(RadialAxis, self).__init__(*args, **kwargs)
+        self.sticky_edges.y.append(0)
+
     def _get_tick(self, major):
         if major:
             tick_kw = self._major_tick_kw
@@ -849,6 +853,7 @@ def __init__(self, *args, **kwargs):
             kwargs.pop('rlabel_position', 22.5))
 
         Axes.__init__(self, *args, **kwargs)
+        self.use_sticky_edges = True
         self.set_aspect('equal', adjustable='box', anchor='C')
         self.cla()
     __init__.__doc__ = Axes.__init__.__doc__