plotting on top of images

[Jaroslav Hajek]

On Wed, May 27, 2009 at 3:20 AM, Ben Abbott <bpabbott at mac.com> wrote:
>
> On May 26, 2009, at 6:33 PM, Ben Abbott wrote:
>
>>
>> On May 26, 2009, at 5:42 PM, John W. Eaton wrote:
>>
>>> On 26-May-2009, Ben Abbott wrote:
>>>
>>> | While I don't recall the details, I have a test script related to
>>> that
>>> | changeset. It is attached.
>>> |
>>> | Presently, it fails for me with and without the semicolon (but
>>> | slightly differently). I've attached the gnuplot errors as well.
>>> |
>>> | Ben
>>> |
>>> | <multiplot.m>| Without the ";"
>>> |
>>> | octave:10> multiplot
>>> | octave:11>
>>> | multiplot> splot "-" binary format='%float64' record=49x49 using
>>> ($1):($2):($3):($4) title "" with pm3d linestyle 1 splot "-" binary
>>> array=2x2 scan=yx origin=(1,1) dx=1 dy=1 using 1 title "" with image
>>> splot "-" binary array=4x4 scan=yx origin=(1,1) dx=1 dy=1 using 1
>>> title "" with image splot "-" binary array=2x2 scan=yx origin=(1,1)
>>> dx=1 dy=1 using 1 title "" with image splot "-" binary array=4x4
>>> scan=yx origin=(1,1) dx=1 dy=1 using 1 title "" with image ;
>>> |
>>>
>>>                                          ^
>>> |            line 0: ';' expected
>>> |
>>> |
>>> | Now with the ";"
>>> |
>>> | octave:11> multiplot
>>> | octave:12>
>>> | multiplot> splot "-" binary format='%float64' record=49x49 using
>>> ($1):($2):($3):($4) title "" with pm3d linestyle 1 splot "-" binary
>>> array=2x2 scan=yx origin=(1,1) dx=1 dy=1 using 1 title "" with
>>> image; splot "-" binary array=4x4 scan=yx origin=(1,1) dx=1 dy=1
>>> using 1 title "" with image; splot "-" binary array=2x2 scan=yx
>>> origin=(1,1) dx=1 dy=1 using 1 title "" with image; splot "-" binary
>>> array=4x4 scan=yx origin=(1,1) dx=1 dy=1 using 1 title "" with
>>> image; splot "-" binary array=2x2 scan=yx origin=(1,1) dx=1 dy=1
>>> using 1 title "" with image; splot "-" binary array=4x4 scan=yx
>>> origin=(1,1) dx=1 dy=1 using 1 title "" with image; ;
>>> |
>>>
>>>                                          ^
>>> |            line 0: ';' expected
>>>
>>> These multiple splot commands come from the
>>>
>>> hold on
>>> colorbar
>>> imagesc(1./hilb(2));
>>> hold off
>>>
>>> hold on
>>> imagesc(1./hilb(4));
>>> hold off
>>>
>>> commands?  I don't see that at all.  If I look at what's sent to
>>> gnuplot, I don't see any splot commands.  Also, with the current
>>> sources, I don't see any errors unless I make the change I proposed
>>> here:
>>>
>>> https://www-old.cae.wisc.edu/pipermail/bug-octave/2009-May/
>>> 008613.html
>>>
>>> So I guess that change is not the right thing.  But without it,
>>> plotting lines on top of images is broken.  I think we need a fix for
>>> this problem before we release 3.2.0.
>>>
>>> jwe
>>
>> hmmm ... it would appear something is wrong with my copy of the
>> current sources :-(
>>
>> I'll fix that before comment further.
>>
>> Ben
>
> It appears that I've fixed the problem with my build. I appear to have a
> working solution. However, I'm not very confident in it as I haven't studied
> this part of the sources sufficiently to understand it sufficiently.
>
> The part of the sources where the problem lies appears (to me) to have been
> contributed by David when he added the isosurface.
>
> David, if you have the time, can you comment?
>
> Ben
>

Since it seems to work, right now we're taking this one. If David
manages to comment before the final RC of 3.2, we can still fix it.

I just moved the demos to hold.m, as I don't think demos for internal
functions make much sense.

thanks

-- 
RNDr. Jaroslav Hajek
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz