[Octave-bug-tracker] [bug #32980] for backend FLTK, real is used for axes. double should be used

[Rik]

Follow-up Comment #17, bug #32980 (project octave):

The approach is right but it is slightly more complicated.  The data needs to
be shifted AND normalized.  For example, try this simple plot.


x = 1:10;
y = x * 1e40;
h = plot (x,y);


This produces a blank plot for me because 1e40 is beyond what is representable
in a variable of class single.  Offsetting in this case doesn't help because
even after offsetting the new y-axis range is from -5e40 to +5e40 and both of
those values are still not representable.

I think you can get this to work by both shifting by the mean and normalizing
by the mean as well.  I just did some command line work and dividing ydata by
1e40, ytick by 1e40, and ylim by 1e40 caused the correct graph to show up.




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