Plotting masked data working?

Hi, John and all, is the recent patch for use of masked

    > data in plotting lines (and contours) working? What is
    > the simplest example of using it?

    > I got this with recent CVS

I don't know how this bug crept into CVS (but I'm sure it's my fault),
but you need to edit the add_line function in Axes in the section
which reads

        xdata = l.get_xdata()
        ydata = l.get_ydata()

and replace it with

        xdata = l.get_xdata(valid_only=True)
        ydata = l.get_ydata(valid_only=True)

Also, FYI,

  > python examples/ -numarray

should be

  > python examples/ --numarray