Merge pull request matplotlib#1557 from WeatherGod/invert_autoscale

inverting an axis shouldn't affect the autoscaling setting

Author: dmcdougall

lib/matplotlib/axes.py

@@ -2421,7 +2421,7 @@ def set_axis_bgcolor(self, color):
     def invert_xaxis(self):
         "Invert the x-axis."
         left, right = self.get_xlim()
-        self.set_xlim(right, left)
+        self.set_xlim(right, left, auto=None)
 
     def xaxis_inverted(self):
         """Returns *True* if the x-axis is inverted."""
@@ -2641,7 +2641,7 @@ def set_xticklabels(self, labels, fontdict=None, minor=False, **kwargs):
     def invert_yaxis(self):
         "Invert the y-axis."
         bottom, top = self.get_ylim()
-        self.set_ylim(top, bottom)
+        self.set_ylim(top, bottom, auto=None)
 
     def yaxis_inverted(self):
         """Returns *True* if the y-axis is inverted."""

lib/matplotlib/tests/test_axes.py

@@ -419,6 +419,29 @@ def test_hexbin_extent():
 
     ax.hexbin(x, y, extent=[.1, .3, .6, .7])
 
+@cleanup
+def test_inverted_limits():
+    # Test gh:1553
+    # Calling invert_xaxis prior to plotting should not disable autoscaling
+    # while still maintaining the inverted direction
+    fig = plt.figure()
+    ax = fig.gca()
+    ax.invert_xaxis()
+    ax.plot([-5, -3, 2, 4], [1, 2, -3, 5])
+
+    assert ax.get_xlim() == (4, -5)
+    assert ax.get_ylim() == (-3, 5)
+    plt.close()
+
+    fig = plt.figure()
+    ax = fig.gca()
+    ax.invert_yaxis()
+    ax.plot([-5, -3, 2, 4], [1, 2, -3, 5])
+
+    assert ax.get_xlim() == (-5, 4)
+    assert ax.get_ylim() == (5, -3)
+    plt.close()
+
 @image_comparison(baseline_images=['nonfinite_limits'])
 def test_nonfinite_limits():
     x = np.arange(0., np.e, 0.01)

lib/mpl_toolkits/mplot3d/axes3d.py

@@ -1389,7 +1389,7 @@ def invert_zaxis(self):
             This function was added, but not tested. Please report any bugs.
         """
         bottom, top = self.get_zlim()
-        self.set_zlim(top, bottom)
+        self.set_zlim(top, bottom, auto=None)
 
     def zaxis_inverted(self):
         '''