How can I display a plot from a script?

millermj
67 ●2 ●2 ●10

If I type

plot(x^2, (x,-2,2))

in sage, I get the expected plot, displayed as a png file by my default image viewer. If instead I put the line

plot(x^2, (x,-2,2)).show()

in a file test.sage and run

sage test.sage

from the command line, I get

Graphics object consisting of 1 graphics primitive

typed on the command line, but no displayed plot.

How do I display a plot from a script?

1 Answer

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dom
46 ●1 ●1

I suppose you have a local Linux (Ubuntu) operating system installed on your desktop/laptop (eg : you don't use a SMC terminal).

fill your test.sage with these lines :

g = plot(x^2, (x,-2,2)) 
save(g,'/tmp/dom.png',axes=False,aspect_ratio=True) 
os.system('display /tmp/dom.png')

then execute (if 'sage' command is in PATH):

sage test.sage

A window opens (because you have a X server running in your Linux OS) displaying the PNG file.

You need to have 'imagemagick' installed un order to use display command (last line of the script) .. eg sudo apt-get install imagemagick

Thanks! I would also add an & to the end of the display command, so that the script would continue to run, so:

   os.system('display /tmp/dom.png &')

millermj ( 2017-06-15 22:24:49 +0100 )edit

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Asked: 2017-05-27 20:37:44 +0100

Seen: 1,597 times

Last updated: May 27 '17