Allow invalid limits when panning.

anntzer · anntzer · commit 268e955670f4 · 2017-10-11T01:50:15.000-07:00
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -2822,6 +2822,7 @@ def _set_lim(self, axis, low, high, low_name, high_name,
         """Helper factoring the functionality of `get_{x,y,z}lim`."""
         # Perhaps we can use axis.{get,set}_view_interval()... but zaxis seems
         # to behave differently.
+        _called_from_pan = kw.pop("_called_from_pan", False)
         if kw:
             raise ValueError("Unrecognized kwargs: {}".format(kw))
         axis_name = axis.axis_name
@@ -2835,7 +2836,8 @@ def _set_lim(self, axis, low, high, low_name, high_name,
         self._process_unit_info(**{"{}data".format(axis_name): [low, high]})
         low, high = map(axis.convert_units, [low, high])
         for limit in [low, high]:
-            if not np.isreal(limit) or not np.isfinite(limit):
+            if not (_called_from_pan or
+                    np.isreal(limit) and np.isfinite(limit)):
                 raise ValueError(
                     "Axis limits must be (or convert to) finite reals")
         if low == high:
@@ -3774,8 +3776,8 @@ def format_deltas(key, dx, dy):
                 warnings.warn('Overflow while panning')
                 return
 
-        self.set_xlim(*result.intervalx)
-        self.set_ylim(*result.intervaly)
+        self.set_xlim(*result.intervalx, _called_from_pan=True)
+        self.set_ylim(*result.intervaly, _called_from_pan=True)
 
     @cbook.deprecated("2.1")
     def get_cursor_props(self):
