Matplotlib Errorbar Caps Missing

Question

I\'m attempting to create a scatter plot with errorbars in matplotlib. The following is an example of what my code looks like:

import matplotlib.pyplot as pl         


        

Answer 1

Slight simplification of astromax's answer:

plt.errorbar(x,y, yerr=err, capsize=20, elinewidth=3, markeredgewidth=10)

It seems that somehow markeredgewidth is defaulting to 0 sometimes.