Commit ce1443f4 authored by René Fritze's avatar René Fritze Committed by René Fritze

[gui] stop "empty" visualizatio breaking in MPL internals

parent 9468f577
......@@ -56,7 +56,7 @@ class MatplotlibAxesBase:
# assignment delayed to ensure _plot_init works w/o data
self.U = U
# Rest is only needed with animation
if not separate_axes and self.count == 1:
if U is not None and not separate_axes and self.count == 1:
assert len(self.ax) == 1
delay_between_frames = 200 # ms
self.anim = animation.FuncAnimation(figure, self.animate,
......
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