Re: [Matplotlib-users] Transparency disappears when saving a figure in Postscript

[John H. <jdh...@ac...>]

>>>>> "Eric" == Eric Emsellem <ems...@ob...> writes:

    Eric> Hi, below is a simple script illustration what I wish to do:
    Eric> ==> use new symbols (here ellipses for example) and plot a
    Eric> number of points with 'scatter', allowing transparency
    Eric> (alpha=0.2) to see when two data points overlap.  For some
    Eric> reason this works: 1/ on the figure 2/ when saving as .png
    Eric> but it does NOT work when saving as a Postscript file.

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

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

Postscript does not support transparency -- this is a limitation of
postscript and not the matplotlib ps backend.  If you want vector
graphics with transparency, you'll need SVG or PDF.

JDH