[Octave-bug-tracker] [bug #59370] Plotting produces wrong output or takes long time, depending on graphics toolkit

[Pantxo Diribarne]

Update of bug #59370 (project octave):

                Category:    Plotting with OpenGL => Plotting with gnuplot  
              Item Group:        Incorrect Result => Performance            

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Follow-up Comment #3:

On linux, all I can reproduce is the known part of the bug. Since OpenGL
toolkits both only handle single precision floating point numbers, the plot
command fails baddly (see printout below): this looks like bug #32980 or some
flavor of it (bug #36094). 
The strange thing is that it works for you with fltk...

You can workaround it by scaling your data, e.g :


...
plot ((S - mean (S)) / (max (S) - min (S)))


As for gnuplot, it produces the right output instantly and doesn't trigger any
intensive cpu load.

I'll change the category to "Plotting with Gnuplot", since the OpenGL part of
the bug is already tracked elsewhere. I'll also change the Item group to
performance since you report a long time lag and high cpu load.


(file #50141)
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Additional Item Attachment:

File name: toto.png                       Size:7 KB
    <https://file.savannah.gnu.org/file/toto.png?file_id=50141>



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