How to create a matplotlib bar chart with a threshold line?

Question

I'd like to know how to create a matplotlib bar chart with a threshold line, the part of bars above threshold line should have red color, and the parts below the threshold line should be green. Please provide me a simple example, I couldn't find anything on the web.

Answer 1

You can simply use axhline like this. See this documentation

# For your case
plt.axhline(y=threshold,linewidth=1, color='k')

# Another example - You can also define xmin and xmax
plt.axhline(y=5, xmin=0.5, xmax=3.5)