Hello

I am looking for a simple way to plot my data from a matrix (or data frame) using a 3rd column as category to code the data points.

for example:
xyz
543240
104230
15901
203241
25781
3042340
357891
405670
45780
50531

Ideally, I'd like 0 or 1 to correspond to a color but I'd settle for a symbol at this point.  I have tried working with pch but can't get it to work.

Thanks
Kat 
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