@@ -57,7 +57,8 @@ def __init__(self, x, y, triangles=None, mask=None):
         if triangles is None:
             # No triangulation specified, so use matplotlib._qhull to obtain
             # Delaunay triangulation.
-            self.triangles, self._neighbors = _qhull.delaunay(x, y, sys.flags.verbose)
+            self.triangles, self._neighbors = _qhull.delaunay(self.x, self.y,
+                                                              sys.flags.verbose)
             self.is_delaunay = True
         else:
             # Triangulation specified. Copy, since we may correct triangle