matplotlib-users Mailing List for matplotlib

Hi,
How do I make Ternary plot with Matplotlib?
(http://en.wikipedia.org/wiki/Ternary_plot)
Or even more common question how it possible to make a plot based on non 
orthogonal axes? 
(like on the picture with Miller-Bravais indices 
http://en.wikipedia.org/wiki/Miller_indices)
Thanks,
-- 
Alexey

Hiya, i'm having a problem getting a valid postscript file produced on OS X.
Using the example subplot_demo.py, modified to include the line:
 savefig('subplot_demo')
in the place of the show() command, and running it using:
 python subplot_demo.py -dPS
Produces the .ps file (available here for reference:
http://www.irbdavid.com/misc/subplot_demo.ps ), which can't be opened
by Preview on os x - says its can't convert it to PDF & cant open the
file. Checked the permissions etc on the file and they're fine.
Its pretty much a default installation of matplotlib etc, and output
displays fine on screen, using the wxPython / wxAgg thing (I think
that's what i mean :D )
Any suggestions?
Regards,
Dave

George Nurser wrote:
> On 01/09/06, Eric Firing <ef...@ha...> wrote:
>> Scott,
>>
>> This is fixed now in svn. (I will probably go back shortly and make
>> another change to improve efficiency.) There was a one-line bug in
>> contour.py, but the fundamental problem was that colors.ColorConverter
>> (which handles color inputs for collections, among other things) was
>> stripping off the alpha value and replacing it with 1.0.
> 
> Eric,
> Now that this bug is sorted, will it enable pcolormesh to use alpha =
> 0 to not plot missing data?
George,
Unfortunately not--it is a completely different bug. A while ago I 
tracked the pcolormesh alpha bug down into the bowels of the quadmesh 
code, where it is making fairly low-level Agg calls. I didn't write 
quadmesh, I have never dealt with Agg directly, and I don't think I can 
afford the time that it would take for me to understand it--assuming I 
could. So, I've been unable to fix the pcolormesh alpha bug. I think 
it will require an Agg wizard, preferably one of the original quadmesh 
authors.
Eric

On 01/09/06, Eric Firing <ef...@ha...> wrote:
> Scott,
>
> This is fixed now in svn. (I will probably go back shortly and make
> another change to improve efficiency.) There was a one-line bug in
> contour.py, but the fundamental problem was that colors.ColorConverter
> (which handles color inputs for collections, among other things) was
> stripping off the alpha value and replacing it with 1.0.
Eric,
Now that this bug is sorted, will it enable pcolormesh to use alpha =
0 to not plot missing data?
--George.

Hi all,
I have a question about zorder and Axis elements. I read in the 
thread titled "zorder not working for grid lines??" that since grid 
lines are Axis elements, they don't respect the zorder. It's 
possible to set grid lines below other plot elements with 
Axis.set_axisbelow(). However, I have a case where I want grid lines 
to be below my plot elements, but I want the ticks to be above them 
(test code attached). As it stands, they can be either both below or 
both above.
Has anyone found a way around this limitation? Is having zorder 
apply to Axis elements on the wishlist?
Thanks for any info,
Mike