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File: read.delim-base.R
({}) x <- read.delim(file, quote = "", na.strings = NULL, stringsAsFactors = FALSE) print(head(x, 10)) a <- head(x) b <- tail(x) c <- x[sample(NROW(x), 100), ] d <- x[x$X1 > 3, ] e <- tapply(x$X1, as.integer(x$X2), mean)