How do I plot a step function with Matplotlib in Python?

Question

This should be easy but I have just started toying with matplotlib and python. I can do a line or a scatter plot but i am not sure how to do a simple step function. Any help

Answer 1

If you have non-uniformly spaced data points, you can use the drawstyle keyword argument for plot:

x = [1,2.5,3.5,4] 
y = [0.002871972681775004, 0.00514787917410944, 
     0.00863476098280219, 0.012003316194034325]

plt.plot(x, y, drawstyle='steps-pre')

Also available are steps-mid and steps-post.