contourf(peaks) ?

[Ben Abbott]

On Thursday, October 16, 2008, at 09:27AM, "Ben Abbott" <bpabbott at mac.com> wrote:
>
>On Oct 16, 2008, at 6:00 AM, David Bateman wrote:
>
>> David Bateman wrote:
>>> Kai Habel wrote:
>>>> Hello all,
>>>>
>>>> I am currently recompiling octave, can someone please confirm/deny  
>>>> that
>>>> with a recent tip
>>>>
>>>> contourf(peaks)
>>>>
>>>> shows only a cyan rectangle?
>>>>
>>>> Kai
>>>>
>>>>
>>>
>>> Confirmed... This looks like its because of the recent changes for  
>>> binary transfer of color palette data to gnuplot. Also if you try
>>>
>>> contourf(peaks())
>>> colorbar()
>>>
>>> you'll see that there is an error given by gnuplot and the colorbar  
>>> is not displayed.. I'd rather not touch this myself and leave  
>>> Daniel who made these changes fix the issue..
>>>
>> The attached changeset at least fixes the binary transfer code of  
>> gnuplot such that
>>
>> contour(peaks()); colorbar();
>>
>> works as expected... It appears that this recent change in fact  
>> broke all images that might be displayed. Not sure why  
>> "contourf(peaks())" is broken though..
>>
>> Regards
>> David
>
>It appears the problem has to do with the order of the handles of the  
>patch objects. I believe John changed the order so that new objects  
>are added to the beginning (as is done in Matlab). This means that the  
>patches in contourf are drawn in reverse order with the lowest/largest  
>one covering the others ... to be honest I haven't looked at the  
>detail. So my impression might be wrong ... perhaps Daniel changed the  
>order in his binary transfer?
>
>In any event, if the problem is not with the binary transfer, the  
>attached changeset fixes it.
>

Sorry for the duplicated response. I received an error when sending this email and sent a similar one a few minutes later.

Ben