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Using matplotlib inside Sage

asked 2016-08-22 20:27:30 +0200

Federico gravatar image

I have difficulties in using matplotlib commands inside Sage.

I took a demo from matplotlib's website:

Simple demo of a horizontal bar chart.
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.pyplot as plt

# Example data
people = ('Tom', 'Dick', 'Harry', 'Slim', 'Jim')
y_pos = np.arange(len(people))
performance = 3 + 10 * np.random.rand(len(people))
error = np.random.rand(len(people))

plt.barh(y_pos, performance, xerr=error, align='center', alpha=0.4)
plt.yticks(y_pos, people)
plt.title('How fast do you want to go today?')

If I run it as python code (e.g. %run inside ipython) it works and shows a bar chart on the screen; if I run it inside sage or sage -python, then I see no result. I presume that Sage does some wrapping of matplotlib's output that interacts with the plotting?

How can I properly use matplotlib inside Sage code?

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answered 2016-08-23 21:17:59 +0200

ndomes gravatar image



instead of
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And if you want to see the image file:

from PIL import Image
image ='mychart.png')
paulmasson gravatar imagepaulmasson ( 2016-08-23 22:22:41 +0200 )edit

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Asked: 2016-08-22 20:27:30 +0200

Seen: 1,981 times

Last updated: Aug 23 '16