I'm trying to work out a way of printing plots as vector graphics that use alpha channel.
I understand that postscript doesn't do alpha, so I was hoping to save the plot as svg, import into illustrator and then save as a pdf and/or print. So I run the following file: (matplotlib svn 2943, os x, WXAgg back end) from pylab import * from numpy import * rx, ry = 1.8, 1. area = rx * ry * pi theta = arange(0, 2*pi+0.01, 0.1) verts = zip(rx/area*cos(theta), ry/area*sin(theta)) x = [0,0.1,0.2, 0.5,0.43] y = [0.,0.1,0.,0.20,.2] scatter(x,y, c='r', edgecolor='k', faceted=True, s=300, marker=None, verts=verts, alpha=0.2) y = array(y) + 0.01 scatter(x,y, c='g', edgecolor='k', faceted=True, s=300, marker=None, verts=verts, alpha=0.2) savefig('alpha_test.svg') Unfortunately if I import alpha_test.svg into Illustrator or Inkscape, the ellipses appear completely solid. Saving directly as .pdf produces a solid image as well. However, if I save the figure as .png, the ellipses are transparent. I had the same problem running a slightly earlier version of matplotlib on a Linux box with GTKAgg Regards, George Nurser.
alpha_test.svg
Description: image/svg
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