revert original default

jklymak · jklymak · commit 3ba5c4cfb187 · 2017-12-02T07:06:26.000-08:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -5232,6 +5232,7 @@ def _pcolorargs(funcname, *args, **kw):
         # is False.
 
         allmatch = kw.pop("allmatch", False)
+        dropdata = kw.pop("dropdata", True)
 
         if len(args) == 1:
             C = np.asanyarray(args[0])
@@ -5274,22 +5275,25 @@ def _pcolorargs(funcname, *args, **kw):
                                 ' X (%d) and/or Y (%d); see help(%s)' % (
                                     C.shape, Nx, Ny, funcname))
 
-            def _interp_grid(X):
-                # helper for below
-                dX = np.diff(X, axis=1)/2.
-                X = np.hstack((X[:, [0]] - dX[:, [0]],
-                                X[:, :-1] + dX,
-                                X[:, [-1]] + dX[:, [-1]])
-                              )
-                return X
-
-            if numCols == Nx:
-                X = _interp_grid(X)
-                Y = _interp_grid(Y)
-
-            if numRows == Ny:
-                X = _interp_grid(X.T).T
-                Y = _interp_grid(Y.T).T
+            if dropdata:
+                 C = C[:Ny - 1, :Nx - 1]
+            else:
+                def _interp_grid(X):
+                    # helper for below
+                    dX = np.diff(X, axis=1)/2.
+                    X = np.hstack((X[:, [0]] - dX[:, [0]],
+                                    X[:, :-1] + dX,
+                                    X[:, [-1]] + dX[:, [-1]])
+                                  )
+                    return X
+
+                if numCols == Nx:
+                    X = _interp_grid(X)
+                    Y = _interp_grid(Y)
+
+                if numRows == Ny:
+                    X = _interp_grid(X.T).T
+                    Y = _interp_grid(Y.T).T
 
         C = cbook.safe_masked_invalid(C)
         return X, Y, C
