st: marker symbols in dotplot

["George Savva" <gs365@medschl.cam.ac.uk>]

Dear Statalist

I need to produce a dotplot (ie using -dotplot- not -graph dot-) using
two different markers or two colours to represent different groups
within the same column.  Is this possible?  I cannot find an option for
this in dotplot or stripplot, and overlays seem not to exist for these
commands.  

Thanks,

George

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