>>>>> "Michael" == Michael Fitzgerald <[EMAIL PROTECTED]> writes:

    Michael> Hi all,

    Michael> I would like a way to set the marker face color to 'None'
    Michael> so that I may see overlapping markers.  I am aware of the
    Michael> workaround using scatter() to set alpha, but alas that's
    Michael> no good for PS output:

    Michael>    http://sourceforge.net/mailarchive/message.php?msg_id=12261949

    Michael> Is this currently possible, or on the dev. radar?  If
    Michael> not, I'll file an official feature request.

You should be able to set the markerfacecolor property to 'None' the
string, as opposed to None, the python null object.  This is a bit
ugly, but None is used in the matplotlib properties to mean "do the
default, ie the rc setting".  If 

  plot(x, y, 'o', markerfacecolor='None')

fails, please post a complete example and we'll look into it.

JDH

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