Simple word cloud example in R

conventions.csv

wordcloud.R

library(wordcloud)
library(RColorBrewer)

conventions <- read.table("conventions.csv",
	header = TRUE,
	sep = ",")

png("dnc.png")
wordcloud(conventions$wordper25k, # words
	conventions$democrats, # frequencies
	scale = c(4,1), # size of largest and smallest words
	colors = brewer.pal(9,"Blues"), # number of colors, palette
	rot.per = 0) # proportion of words to rotate 90 degrees
dev.off()

png("rnc.png")
wordcloud(conventions$wordper25k,
	conventions$republicans,
	scale = c(4,1),
	colors = brewer.pal(9,"Reds"),
	rot.per = 0)
dev.off()

Just before dev.off (), I get the following error

Error in -freq : invalid argument to unary operator
In addition: Warning message:
In max(freq) : no non-missing arguments to max; returning -Inf

@padmt1112 one of the values you're passing in as a parameter is null. You need to make sure your column headers are correct.