Re: Gnuplot question

[Stupendous Man <richmond@a188-l009.rit.edu>]

> I have a file with 3 columns - x,y,z. How can I specify the color/style 
> of the point at x,y based on the value of z?

  Gee, how many times have I wished to do the same thing?  

  As far as I can tell, it's not possible with gnuplot; you might
be able to do it with a program which calls the gnuplot library
functions directly, but I'm not sure.

  It was exactly this need which drives me to use the PGPLOT
graphics library.  It's nowhere as convenient as Gnuplot, but it
has more power.  One can do what you want by drawing one symbol
at a time ....

  You might check out Mongo, or SuperMongo, or SM.  I believe
that they have the ability to change the point size/color/style
based on a third column.

                                   Michael Richmond