solve issue #28105

Clement Gilli · Clement Gilli · commit 1ea32395c23f · 2024-04-19T18:33:29.000+02:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -5228,11 +5228,6 @@ def reduce_C_function(C: array) -> float
                 vmin = vmax = None
             bins = None
 
-        # autoscale the norm with current accum values if it hasn't been set
-        if norm is not None:
-            if norm.vmin is None and norm.vmax is None:
-                norm.autoscale(accum)
-
         if bins is not None:
             if not np.iterable(bins):
                 minimum, maximum = min(accum), max(accum)
@@ -5248,6 +5243,11 @@ def reduce_C_function(C: array) -> float
         collection._internal_update(kwargs)
         collection._scale_norm(norm, vmin, vmax)
 
+        # autoscale the norm with current accum values if it hasn't been set
+        if norm is not None:
+            if collection.norm.vmin is None and collection.norm.vmax is None:
+                collection.norm.autoscale()
+
         corners = ((xmin, ymin), (xmax, ymax))
         self.update_datalim(corners)
         self._request_autoscale_view(tight=True)
