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Hello, List, I am a new user of the R project, and I need some help in plotting a legend. I am using the PBSmapping library to plot map of Ohio and heat color it with the count of employees in each county. As a guide, I am using "Data Mashups in R." I am able to plot the map with the colors; however, I would like to put a legend with a single box full of these colors, but only show