Hello,
Try to study the following example.
A <- c("rs10000056", "rs10000076", "ab1234567")
x <- 1:3
dat <- data.frame(A, x)
inx <- grepl("^rs", dat$A)
dat[!inx, ]
Hope this helps,
Rui Barradas
Em 30-01-2017 14:23, greg holly escreveu:
Hi all;
I have a file which has about 3.000.000 lines. Most of the lines at first
column start with "rs", for example, rs10000056, rs10000076 and so on. I
would like to get the lines which do not start with "rs" . Your helps
highly appreciated.
Regards,
Greg
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