Hi,

below is a simple script illustration what I wish to do:

==> use new symbols (here ellipses for example) and plot a number of

points with 'scatter', allowing transparency (alpha=0.2) to see when two

data points overlap.

For some reason this works: 1/ on the figure 2/ when saving as .png

but it does NOT work when saving as a Postscript file.

Is there an easy solution for this? (I am using GTKAgg, mpl 0.87.5)

(doing a "convert" afterwards works but this is not very practical here)

thanks in advance

Eric

P.S.: for the example above, just using standard circles would have the

same effect

## ···

#===============================================

import numpy as num

rx, ry = 1.8, 1.

area = rx * ry * num.pi

theta = num.arange(0, 2*num.pi+0.01, 0.1)

verts = zip(rx/area*num.cos(theta), ry/area*num.sin(theta))

clf()

x = [0,0.1,0.2, 0.5]

y = [0.,0.1,0.,0.2]

scatter(x,y, c='0.8', edgecolor='k', faceted=True, s=300, marker=None,

verts=verts, alpha=0.2)

## saving as a png

savefig('tmp.png')

## the figure shows the transparency well

## now saving as a postscript

savefig('tmp.ps')

## ==> the symbols overlap but the transparency is gone