[Octave-bug-tracker] [bug #53504] axis("equal") makes plot3 unusably small with graphics_toolkit("gnuplot")

[Dan Sebald]

Follow-up Comment #5, bug #53504 (project octave):

Ah, I see what you are getting at now.  With "equal" scaling on all axes, the
[0,0.01] range is 1/100 the x scale.

The manner in which gnuplot works is that it centralizes the figure.  It isn't
smart enough to know it could expand out the visual range and zoom a bit even
if that means it has to offset (in this case) the y axis, whereas Qt toolkit
at least makes better use of the screen area for the [0,1] range.  In other
words, gnuplot is sort of an absolute relationship as far as the screen view,
i.e., "scale: 1.00000, 1.00000", whereas Qt is more relative use of the screen
view.

Does this seem like an Octave bug, or perhaps gnuplot?  We could attempt to
compensate perhaps by generating a measure of


gnuplot_scale = min([ ...
  max([x_axis_range/y_axis_range y_axis_range/x_axis_range]) ...
  max([x_axis_range/z_axis_range z_axis_range/x_axis_range]) ...
  max([z_axis_range/y_axis_range y_axis_range/z_axis_range])];


or something similar.

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