[R] plotting question

[Thaddeus Tarpey]

I would like to plot two different samples on the same scatterplot in R
using different symbols for the different groups.
Could someone please let me know how this can be done?  Thank you very much.

Thad


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Thaddeus Tarpey                                   Phone: (937) 775-2861
Wright State University                             Fax: (937) 775-2081
Department of Mathematics and Statistics
Dayton,  Ohio  45435
Home-page: http://www.math.wright.edu/People/Thad_Tarpey/thad.htm
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