DOC: better unit argument errors axes.bar

lib/matplotlib/axes/_axes.py

@@ -2274,10 +2274,20 @@ def bar(self, x, height, width=0.8, bottom=None, *, align="center",
         # left, bottom, width, height vectors
         if align == 'center':
             if orientation == 'vertical':
-                left = x - width / 2
+                try:
+                    left = x - width / 2
+                except TypeError as e:
+                    raise TypeError(f'the dtypes of parameters x ({x.dtype}) '
+                                     f'and width ({width.dtype}) '
+                                     'are incompatible') from e
                 bottom = y
             elif orientation == 'horizontal':
-                bottom = y - height / 2
+                try:
+                    bottom = y - height / 2
+                except TypeError as e:
+                    raise ValueError(f'the dtypes of parameters y ({y.dtype}) '
+                                     f'and height ({height.dtype}) '
+                                     'are incompatible') from e
                 left = x
         elif align == 'edge':
             left = x