matplotlib
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‎lib/matplotlib/quiver.py‎
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‎lib/matplotlib/quiver.py‎
Copy file name to clipboardExpand all lines: lib/matplotlib/quiver.py
+5Lines changed: 5 additions & 0 deletions
@@ -922,6 +922,11 @@ def __init__(self, ax, *args, **kw):
             kw['edgecolors'] = barbcolor
             kw['facecolors'] = flagcolor
 
+        # Explicitly set a line width if we're not given one, otherwise
+        # polygons are not outlined and we get no barbs
+        if 'linewidth' not in kw and 'lw' not in kw:
+            kw['linewidth'] = 1
+
         # Parse out the data arrays from the various configurations supported
         x, y, u, v, c = _parse_args(*args)
         self.x = x