Matlibplot step function index 0

Question

Hi I am trying to plot this using matplotlib's step function

from matplotlib.pyplot import step, show, xlim

time = [0.0, 0.0, 0.0, 25.3039, 25.5539, 25.8049, 45.8699, 46.1209, 46.3719, 46.6229, 63.1719, 63.4239, 63.6749, 79.9779, 80.2289, 80.4799, 80.7309]
value = ['0', '0', '0', '93', '940', '951', '940', '437', '422', '421', '423', '598', '605', '192', '3', '1', '0']

xlim(0, 145)
step(time,value)

show()

I am hoping the step function will show the plot to be 0 and starts at 93 from time 25.3039. Instead I see value 93 from time 0 as shown in the graph. I need to keep the timeline to start from 0 so I can't really change my xlim to start from 25.3039

What should I do to fix the issue? Any help will be appreciated!

Thanks!

Community · Accepted Answer · 2017-05-23 12:28:30Z

4

You need to set where step should step (doc). The default is that the locations are interpreted as the right edge, you want the locations interpreted as the left edge.

step(time,value,where='post')

See Step function in matplotlib for a longer explanation/example.

edited May 23, 2017 at 12:28

CommunityBot

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answered Oct 6, 2012 at 2:00

tacaswell

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