1library(vroom)
2x <- vroom(file, trim_ws = FALSE, quote = "", escape_double = FALSE, na = character(), altrep = FALSE)
3print(x)
4a <- head(x)
5b <- tail(x)
6c <- x[sample(NROW(x), 100), ]
7d <- x[x$X1 > 3, ]
8e <- tapply(x$X1, as.integer(x$X2), mean)
9