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plot error: No X11 DISPLAY variable was set

asked 2016-10-05 03:24:03 -0500

Caterpillar gravatar image

updated 2016-10-05 03:43:03 -0500

Hi, I have to make a plot of the following formula

x,y=var('x, y')

but I obtain error message

/usr/lib64/python2.7/site-packages/sage/plot/plot3d/\ :704: DeprecationWarning: Unnamed ranges for more than one variable is deprecated and will be removed from a future release of Sage; you can used named ranges instead, like (x,0,2) See for details. g, ranges = setup_for_eval_on_grid(f, [urange,vrange], plot_points) Exception in thread "main" java.lang.ExceptionInInitializerError Caused by: java.awt.HeadlessException: No X11 DISPLAY variable was set, but this program performed an operation which requires it. at sun.awt.HeadlessToolkit.getScreenSize( at<clinit>(JmolPanel.ja\ va:173) /usr/lib64/python2.7/site-packages/sage/repl/rich_output/display_manager\ .py:570: RichReprWarning: Exception in _rich_repr_ while displaying object: Jmol failed to create file '/home/sage/.sage/temp/host/1582/dir_0OP2db/preview.png', see '/home/sage/.sage/temp/host/1582/tmp_4sBlqC.txt' for details RichReprWarning, Graphics3d Object</clinit>

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Given that your second error is the problem one (something where your Java isn't working), please give us more information about your setup - command line, notebook, distro, etc? Likely you really don't have an X11 "Xwindows" display going on.

kcrisman gravatar imagekcrisman ( 2016-10-05 06:04:10 -0500 )edit

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answered 2016-10-05 03:44:59 -0500

tmonteil gravatar image

updated 2016-10-05 15:37:00 -0500

As the deprecation warning says, you have to use names ranges like (x,0,2) to say that x belongs to the interval [0,2], and the same for y. The following works for me:

sage: x,y=var('x, y')
....: plot3d((x^2)*y-x*y+x*y^3,(x,0,5),(y,0,5))

EDIT If the problem comes from java, you can run your command from a notebook, a javascript version of jmol will be used.

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Caterpillar gravatar imageCaterpillar ( 2016-10-05 04:24:47 -0500 )edit

Workaround at third line of code at

Caterpillar gravatar imageCaterpillar ( 2016-10-05 04:46:49 -0500 )edit

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Asked: 2016-10-05 03:24:03 -0500

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Last updated: Oct 05 '16