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# read data and replace dots in names with underscores | |
obesity = read.csv( | |
'http://www.stat.berkeley.edu/classes/s133/data/obesity.csv', | |
stringsAsFactors = F | |
) | |
names(obesity) = gsub("\\.", "_", names(obesity)) | |
# add column with two letter state names and | |
obesity = plyr::mutate(obesity, | |
State = str_trim(State), |
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