How to save figure in Matplotlib in Python [duplicate]

Question

I am trying to save my figure in Matplotlib to a file but when I run the command to save the image, it doesn't give any errors but I can't see the file.

plt.savefig('Traveling Salesmen Graph.png')

@TrentonMcKinney I don't have a plt.show() I just have a plt.plot() — Spidey Zac
– Spidey Zac, Commented Jul 13, 2020 at 3:32
Please provide a Provide a Minimal, Reproducible Example (e.g. code, data, errors) as text — Trenton McKinney
– Trenton McKinney, Commented Jul 13, 2020 at 3:33
@SpideyZac It might help to save the file to a specific location and check there. When I ran your command, the figure is saved to the working directory. — Madhoolika
– Madhoolika, Commented Jul 13, 2020 at 3:35

Mark McElroy · Accepted Answer · 2020-07-13 06:02:08Z

9

pyplot keeps track of the "current figure", and functions called on the library which require a figure operate on that, but you can also be more explicit by calling savefig() on the figure object.

as an example from https://pythonspot.com/matplotlib-save-figure-to-image-file/:

import matplotlib
import matplotlib.pyplot as plt
import numpy as np

y = [2,4,6,8,10,12,14,16,18,20]
x = np.arange(10)
fig = plt.figure()
ax = plt.subplot(111)
ax.plot(x, y, label='$y = numbers')
plt.title('Legend inside')
ax.legend()
#plt.show()

fig.savefig('plot.png')

Being explicit in this way should solve your issue.

For references to pyplot functions which operate on the "current figure" see: https://matplotlib.org/3.2.1/api/_as_gen/matplotlib.pyplot.html

edited Jul 13, 2020 at 6:02

answered Jul 13, 2020 at 3:28

Mark McElroy

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2 Comments

Mad Physicist Over a year ago

plt.savefig is very much a thing. This is not factually correct

Mark McElroy Over a year ago

@MadPhysicist You're right, I've modified the answer.

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