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並前往https://www.r-bloggers.com/2013/12/read-line-by-line-of-a-file-in-r/

Read line by line of a file in R | R-bloggers

Loop over a file connection. for(i in 1:n) {. tmp <- scan(file=con, nlines=1, quiet=TRUE). ## do something on a line of data. }.

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