exporting with alpha channel, mathtext, contour labels

issues: 1. When exporting the following image, which is a

    > pcolor plot with alpha=0.15 and contours on top, I get no
    > alpha channel in the resulting output, regard of whether I
    > export as EPS or SVG. Is exporting with alpha channel not
    > supported in those formats? 2. In the titles, which are

For some reason I did not get the sample image, but could you provide
some example code that replicates the alpha problem on the SVG
backend? As others have noted, PS doesn't have an alpha channel so
there is nothing we can do there, but SVG *should* work. Are you sure
it's not your SVG viewer?

JDH

Hi John

Here's a test script that gives the wrongly exported SVG image. I'm viewing with EOG. When I edit to add "style="opacity:0.15"" it works fine, so there's no prob with EOG.

from pylab import *
import matplotlib.numerix.ma as ma
from matplotlib.colors import ListedColormap

A = flipud(array([[1,2,3,4,5],[1,3,4,5,6],[1,1,4,5,7]]))

M = where(A==1,1,0)

B = ma.array(A,mask=M)

C = ListedColormap(['r','#FF00FF','y','g','b','#FFFF00'])
x = [0,5,10,15,20]
y = [0,5,10]
X,Y = meshgrid(x,y)
X = ma.array(X,mask=B.mask())
Y = ma.array(Y,mask=B.mask())

figure()
pcolor(X,Y,B,alpha=0.15,shading='flat',cmap=C)
hold(True)
contour(x,y,B)
xlabel('something')
ylabel('else')

Cheers
JP

John Hunter wrote:

···

            
    > issues: 1. When exporting the following image, which is a
    > pcolor plot with alpha=0.15 and contours on top, I get no
    > alpha channel in the resulting output, regard of whether I
    > export as EPS or SVG. Is exporting with alpha channel not
    > supported in those formats? 2. In the titles, which are

For some reason I did not get the sample image, but could you provide
some example code that replicates the alpha problem on the SVG
backend? As others have noted, PS doesn't have an alpha channel so
there is nothing we can do there, but SVG *should* work. Are you sure
it's not your SVG viewer?

JDH

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John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/