8000 Fix regression with matplotlib 3.7.0 · python-control/python-control@4c4b3fc · GitHub
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henklaakhenklaak
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Fix regression with matplotlib 3.7.0
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‎control/freqplot.py

Lines changed: 10 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1024,9 +1024,11 @@ def _parse_linestyle(style_name, allow_false=False):
10241024
# Plot the scaled sections of the curve (changing linestyle)
10251025
x_scl = np.ma.masked_where(scale_mask, resp.real)
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y_scl = np.ma.masked_where(scale_mask, resp.imag)
1027-
plt.plot(
1028-
x_scl * (1 + curve_offset), y_scl * (1 + curve_offset),
1029-
primary_style[1], color=c, **kwargs)
1027+
if x_scl.count() >= 1 and y_scl.count() >= 1:
1028+
plt.plot(
1029+
x_scl * (1 + curve_offset),
1030+
y_scl * (1 + curve_offset),
1031+
primary_style[1], color=c, **kwargs)
10301032

10311033
# Plot the primary curve (invisible) for setting arrows
10321034
x, y = resp.real.copy(), resp.imag.copy()
@@ -1044,10 +1046,11 @@ def _parse_linestyle(style_name, allow_false=False):
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# Plot the regular and scaled segments
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plt.plot(
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x_reg, -y_reg, mirror_style[0], color=c, **kwargs)
1047-
plt.plot(
1048-
x_scl * (1 - curve_offset),
1049-
-y_scl * (1 - curve_offset),
1050-
mirror_style[1], color=c, **kwargs)
1049+
if x_scl.count() >= 1 and y_scl.count() >= 1:
1050+
plt.plot(
1051+
x_scl * (1 - curve_offset),
1052+
-y_scl * (1 - curve_offset),
1053+
mirror_style[1], color=c, **kwargs)
10511054

10521055
# Add the arrows (on top of an invisible contour)
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x, y = resp.real.copy(), resp.imag.copy()

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