[Octave-bug-tracker] [bug #45356] Wrong tick labels when limits are set manually

[Rik]

Update of bug #45356 (project octave):

                  Status:                    None => Patch Submitted        

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Follow-up Comment #2:

This is a little strange.  It's not tragic, but could probably be improved. 
The issue is that the routine that tries to find a reasonable spacing of
ticklabels will often produce an extra ticklabel at the far left and far right
of the range.  These values may be outside the current xlim, which isn't a
problem for display because any labels outside the current limits are not
displayed.  Here is an example that is pretty clear.


plot (1:10);
xlim ([4.75, 8.5]);
get (gca, "xtick")
ans =

   4   5   6   7   8   9


The routine for finding ticks likes to divide the range into 5 divisions,
although it will compromise and use 4 or 6 as necessary.  In this case it
produced five divisions: 4-5, 5-6, 6-7, 7-8, 8-9.  But the endpoints of the
divisions 4 and 9 are not visible.  The code to change is
calc_ticks_and_lims() in graphics.cc.  See the attached patch.  It appears to
work, but I only used the example from this bug report for testing.  It would
need a bit more verification before commititng. 


(file #34266)
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Additional Item Attachment:

File name: tick.cset                      Size:0 KB


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