python - Why certain line styles do not work in matplotlib?

Question

I have following codes:

#1
axes[0].plot(x,y, color='blue', ls='>')
#2
axes[0].plot(x,y, color='blue', ls='--')

Why code #2 gives me a dashed line, however, #1 does not give triangles?

ls styles can be found here: https://matplotlib.org/2.1.1/api/_as_gen/matplotlib.pyplot.plot.html

question from:https://stackoverflow.com/questions/65833552/why-certain-line-styles-do-not-work-in-matplotlib

Answer 1

Matplotlib's plot() function lets you control the linestyle as well as the marker. If you notice, the styles webpage you provided (https://matplotlib.org/2.1.1/api/_as_gen/matplotlib.pyplot.plot.html) provides characters for line styles and for markers.

You can pass these as separate arguments to plot():

axes[0].plot(x, y, ls='--', marker='>')

Or you can combine them into a single format string:

axes[0].plot(x, y, '-->')

Or just plot the markers or line on their own:

axes[0].plot(x, y, '--') # line only
axes[0].plot(x, y, '>')  # markers only