avoid implicit np.array -> float conversion

nschloe · nschloe · commit 40f58b077e29 · 2021-04-13T20:16:11.000+02:00
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -739,7 +739,8 @@ def format_data_short(self, value):
                 delta = abs(neighbor_values - value).max()
             else:
                 # Rough approximation: no more than 1e4 divisions.
-                delta = np.diff(self.axis.get_view_interval()) / 1e4
+                a, b = self.axis.get_view_interval()
+                delta = (b - a) / 1e4
             # If e.g. value = 45.67 and delta = 0.02, then we want to round to
             # 2 digits after the decimal point (floor(log10(0.02)) = -2);
             # 45.67 contributes 2 digits before the decimal point
