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Anonymous said...

To fix the `Error in seq.default ...` error change the following:
mydata<-data.frame(NAME_1=states.shp$NAME_1, id=1:num.states, prevalence=rnorm(num.states, 55, 20))

to

mydata<-data.frame(NAME_1=states.shp$NAME_1, id=states.shp$ID_1, prevalence=rnorm(num.states, 55, 20))

I puzzled how could he execute the original code :S

Nov 2, 2015, 6:53:10 AM

Posted to Mapping with ggplot: Create a nice choropleth map in R