Hi,

Other then rebuilding the plots, is there any way either (1) to combine 
existing ggplot2 plots or (2) to extract a layer from an existing plot 
so that it can be added to another?

     Thanks.
-- 
Dr. Marshall Feldman, PhD
Director of Research and Academic Affairs

Center for Urban Studies and Research
The University of Rhode Island
email: marsh @ uri .edu (remove spaces)


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