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Re: [colorbar] wrong dimensions with 'axis square'

From: bpabbott
Subject: Re: [colorbar] wrong dimensions with 'axis square'
Date: Tue, 24 Aug 2010 07:32:52 -0700 (PDT)

On 24 Aug, 2010,at 08:08 AM, Martin Helm <address@hidden> wrote:

Am Dienstag, 24. August 2010, 13:49:05 schrieb Ben Abbott:
> On Aug 24, 2010, at 5:39 AM, Martin Helm wrote:
> > Am Dienstag, 24. August 2010, 09:14:58 schrieb Martijn:
> >> Hi,
> >> When I draw a colorbar along a pcolor image and make the axes square
> >> (axis('square')), the dimensions of the colorbar are also changed, and
> >> the colorbar becomes enreadible low, as shown in the attached image.
> >>
> >> If others can reproduce this, I will file a bug. I am running octave
> >> 3.2.3 and gnuplot 4.2. The problem occurs both with the X11 and the wxt
> >> backend. Do you get the same results?
> >>
> >> Martijn
> >
> > Checked meanwhile 3.2.4 with gnuplot 4.4.0 it looks different, colorbar
> > is not squeezed but the axis are not square.
> > So it is something related to gnuplot version but any combination seems
> > not to behave as it should.
> >
> > Development version (last checkout one hour ago) with gp 4.4. behaves the
> > same.
> >
> > - mh
> Please confirm that the same problem occurs for the colorbar demo's for the
> development version.
> demo ("colorbar", 25:26)
> These two demos work as expected for me when using Gnupot's "x11" or "aqau"
> terminals (gnuplot 4.4 on MacOS X).
> There is a known problem with Gnuplot's wxt terminal on the Mac, which
> should be fixed when 4.4.1 is released, so I can't test that.
> A confirmation that the x11 and wxt terminals behave in a consistent manner
> on Linux or Windows would be helpful as well.
> Ben

I forgot to mention explicitly that I use the wxt by default. The
demo ("colorbar", 25:26)
gives consistent and correct results with 3.3.52+, gnuplot 4.4 patchlevel 0
for wxt and x11 terminal on opensuse 11.2.
Whereas the example from the original post gives a nonsquare graph (but the
colorbar looks right).

- Martin
Thanks Martin. I found the problem in the sources and will push a changeset later today.

The issue is with how Octave handles 3D and 2D images. The "axis equal" command doesn''t work in the proper way for 3D images. In this case a 3D object is being view in a 2D perspective. That an be fixed by checking for the 2D perspective with displaying 3D objects.


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