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File: readr-dplyr.R
({ library(readr); library(dplyr) }) x <- read_fwf(file, fields, col_types = types) print(x) a <- head(x) b <- tail(x) c <- sample_n(x, 100) d <- filter(x, PERSONS == "06") e <- group_by(x, STATE) %>% summarise(avg_TOTPUM5 = mean(TOTPUMA5))