Matplotlib cannot create a graph

Question

Hello! Using www.sagenb.com I typed the following code in the cell of my worksheet:

import matplotlib.pyplot as plt
plt.plot([1, 3, 2, 4])
plt.show()

Unfortunately there isn't any graph under the cell. What should I do? Thanks.

Accepted Answer

You just need to modify your last line.

import matplotlib.pyplot as plt
plt.plot([1, 3, 2, 4])
plt.savefig('test.png')

You might want to include x-coordinates to the get plot you want.

import matplotlib.pyplot as plt
plt.plot([1,2,3,4],[1, 3, 2, 4])
plt.savefig('test.png')

Also, you can get a nice plot in Sage with list_plot that might do the job for you.

points(...) or line(...,linestyle='') are also good ideas.
kcrisman (Jul 07 '12)

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