Re: bug #40256

[Philip Nienhuis]

Rik wrote:
> On 11/08/2013 10:00 AM, address@hidden wrote:
> > > > Is #40256 (datetick doesn't remove previous X-grid&  ticks) still in the
> > > > > > list? (it is a regression and actually a nasty one for me)
> > > > 11/7/13
> > > >
> > > > Philip,
> > > >
> > > > The bug is listed on the 3.8 Bug Fix list
> > > > (http://wiki.octave.org/3.8_Bug_Fix_List), however it's not listed as an
> > > > official gating item for the release.  I took a quick look at it, but I
> > > > don't spend much time with gnuplot so I don't have a good answer.  The
> > > > problem is not with datetick, but rather with how the command "set (gca,
> > > > 'xticklabel', ...)" works.  Instead of just overwriting the existing
> > > > labels, this is apparently invoking the auto-axis labeling routine.
> > > > Simple
> > > > code to reproduce:
> > > >
> > > > plot (1:4)
> > > > ## At this point labels are 1, 1.5, 2, 2.5, 3, 3.5, 4
> > > > set (gca, 'xtick', 1:4)
> > > > ## At this point labels are 1, 2, 3, 4
> > > > set (gca, 'xticklabel', {'A', 'B', 'C', 'D'})
> > > > ## Now labels are 'A', 1.5, 'B', 2.5, 'C', 3.5, 'D'
> > The underlying issue is that because of bug #33748 and bug #40246 I need to
> > revert to gnuplot. Now gnuplot also bugs out on me.
> > Rescaling before handing off to fltk/OpenGL is quite cumbersome as we'd need
> > to patch all code (many of which is Matlab code still used in Matlab)
> > invoking plotting. That's hundreds of functions to process....
> >
> > Philip
> 11/8/13
>
> Philip,
>
> I hear you.  The use of floats, rather than doubles, by OpenGL is quite a
> problem.  The workaround should be in the graphics engine so that only one
> fix needs to be made and everyone else, the hundreds of m-files in your
> case, benefits.  But, that isn't going to occur for the 3.8.0 release.  I'm
> trying an hg bisect to see if I can find where the xticklabel problem got
> introduced to Octave.  Already I know it was before Jan. 1, 2013.  But this
> isn't my area of the code base so I'm mostly hoping I can identify the
> problem area for someone else to fix.

Thank you. I know you were listening :-)
And I also know there are more urgent things to fix.

Let me repeat you: Hopefully the fix for this makes into 3.8.1.

BTW thanks for pushing patch #8222 (translators to contributors.in)

Philip