[Octave-bug-tracker] [bug #48562] "(xy)axislocation" should support "origin"

[Rik]

Follow-up Comment #5, bug #48562 (project octave):

This is certainly a big improvement.  I applied the patch here
(http://hg.savannah.gnu.org/hgweb/octave/rev/074765d5c83b).

One thing to note is that the labels at the origin overlap the axes line now. 
A simple workaround is to manually set the ticks to exclude the origin.  But
it might be nice to have this done automatically.  This could be done either
in graphics.cc where the ticks are calculated, or in gl-render.cc where the
ticks are displayed.  In either case, there is a bit of mixing between the X
and Y axes.  For example, if the X axes is "top", then it is the maximum ytick
which needs to be removed.

Example from 'demo axis 13'


 clf;
 x = -10:0.1:10;
 y = sin (x)./(1+abs (x)) + 0.1*x - 0.4;
 plot (x, y);
 set (gca, "xaxislocation", "top");
 set (gca, "yaxislocation", "origin");
 box off;
 title ({"no plot box", "xaxislocation = top, yaxislocation = origin"});


Corrected by


set (gca, "ytick", get (gca, "ytick")(1:end-1));


What does Matlab return for


 clf;
 x = -10:0.1:10;
 y = sin (x)./(1+abs (x)) + 0.1*x - 0.4;
 plot (x, y);
 get (gca, 'ytick')
 set (gca, 'xaxislocation', 'top');
 set (gca, 'yaxislocation', 'origin');
 get (gca, 'ytick')


That might tell us whether the ticks are being chosen differently, or whether
it is only the display of the ticks which is suppressed.



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