simple plotting question

Dear R People:

When I plot using type="b", I have circles and lines, which is as it should be.

Is there a way to have filled in circles using the type argument,
please?  Or do I need to call the points function also, please?

Thanks,
Erin

Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com