[R] lines those not started with "rs"

[Rui Barradas]

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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