contour ignores lw argument, no warning/error #13848
Description
Bug report
The command contour does not use lw arguments (unlike, e.g., plot), and does not report an error or warning. The linewidths argument works fine. A simple fix is to explicitly look for lw arguments and set linewidths to that. Happy to put in a PR for this, but I wanted to check first.
import numpy as np
import matplotlib as mpl
import matplotlib.pyplot as plt
print(mpl.__version__)
fig, axes = plt.subplots(ncols=3)
for ax, lw, arg in zip(axes, [1.0, 4.0, 4.0], ['lw', 'lw', 'linewidths']):
aa = np.random.normal(size=1000)
bb = np.random.normal(size=aa.size)
hist, xe, ye = np.histogram2d(aa, bb)
kw = {arg: lw}
ax.contour(hist, **kw)
ax.set_title('{}: {}'.format(arg, lw))
plt.show()Actual outcome
Matplotlib version
- Matplotlib version: 3.0.2