BUG: contourf, restore previous behavior with N=2

efiring · efiring · commit fdcf86ff399e · 2016-07-17T12:49:54.000-10:00
Closes #6782.
diff --git a/lib/matplotlib/contour.py b/lib/matplotlib/contour.py
@@ -1147,7 +1147,7 @@ def _autolev(self, N):
             if self.logscale:
                 self.locator = ticker.LogLocator()
             else:
-                self.locator = ticker.MaxNLocator(N + 1)
+                self.locator = ticker.MaxNLocator(N + 1, min_n_ticks=1)
         zmax = self.zmax
         zmin = self.zmin
         lev = self.locator.tick_values(zmin, zmax)
