pcolor and "interp" [changeset-2]

[Ben Abbott]

On Thursday, October 02, 2008, at 08:55AM, "Kai Habel" <kai.habel at gmx.de> wrote:
>Ben Abbott schrieb:
>>
>> On Oct 1, 2008, at 8:42 PM, Ben Abbott wrote:
>>
>>>
>>> On Sep 30, 2008, at 4:53 PM, Ben Abbott wrote:
>>>
>>>> On Tuesday, September 30, 2008, at 04:40PM, "Ben Abbott"
>>>> <bpabbott at mac.com> wrote:
>>>>> On Tuesday, September 30, 2008, at 04:32PM, "Kai Habel"
>>>>> <kai.habel at gmx.de> wrote:
>>>>>> John W. Eaton schrieb:
>>>>>>> On 30-Sep-2008, Kai Habel wrote:
>>>>>>>
>>>>>>> | I would support interpolated surfaces only for gnuplot
>>>>>>> 4.2.4+(5). In
>>>>>>> | that case "illusions" esp. for pcolor are not required. Users
>>>>>>> who really
>>>>>>> | need interpolated surfaces can use the cvs version(s) of gnuplot.
>>>>>>>
>>>>>>> In that case, do we even need to check the gnuplot version here?
>>>>>> I don't think so.
>>>>>>> What
>>>>>>> is the result if we do not?  Does gnuplot crash, or simply fail to
>>>>>>> interpolate the colors?
>>>>>> In my understanding it should just fail to interpolate, but I have
>>>>>> not
>>>>>> tried this for myself. Maybe, Ben has a complete overview?
>>>>>
>>>>> I'll need to rebuild my gnuplot without the patch applied and find
>>>>> out.
>>>>>
>>>>> I'll get back to the list in a few hours.
>>>>>
>>>>> Ben
>>>>
>>>> Ok ... it only took a few minutes. My package manager still had the
>>>> deb files or unpatched version :-)
>>>>
>>>> I think Kai is correct. If I disable the check the old version of
>>>> gnuplot appear to produce the same results they always did. That
>>>> seems more proper to me. I'll modify the changeset and run a "make
>>>> check" and run some more demos. If all looks good I'll post the
>>>> corrected one later tonight.
>>>>
>>>> Ben
>>>
>>> My prior changes have been checked in. The changeset needed to
>>> implement the version suggested by Kai is attached.
>>>
>>> Ben
>>
>> Trying again. This time with the facecolor bug reported by Michael
>> included.
>>
>Hello Ben,
>
>the interpolation for surfaces works here pretty well. But I noticed one
>gnuplot issue, related to the interpolation.
>
>Try this:
>h=pcolor(peaks(12));
>set(h,'edgecolor','w');
>
>If you now toggle between:
>set(h,'facecolor','interp');
>set(h,'facecolor','flat');
>the white grid changes its  spacing, where it should not.
>
>I don't think we can change this behavior easily. So, I would consider
>this as minor problem and leave it as it is.
>
>Kai

hmmm ...

I don't see this problem in 3.0.2 (can someone verify).

Kai, do you think this is a result of my changes or due to some thing else?

Ben