Re: [R] lines those not started with "rs"

... heh, heh and even simpler (but maybe not much faster) x[substring(x,1,2) != "rs"] (DUHHH!) -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On

Re: [R] lines those not started with "rs"

Rui, et. al.: **IF** the data set can be read into R (3e6 lines x ?bytes/line ??) , then I think for a completely specified regular pattern such as that described by the OP, grep would be a bit inefficient. If x is a vector of strings, and you wish to remove all those that don't begin with "rs"

Re: [R] lines those not started with "rs"

Hello, Try to study the following example. A <- c("rs1056", "rs1076", "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

Re: [R] lines those not started with "rs"

then my solution should work. Bob On 1/30/2017 9:44 AM, greg holly wrote: > Hi Robert; > > I do appreciate your advice. Only the first column of the data is > text. The rest columns are numeric. > > Regards, > > Greg > > On Mon, Jan 30, 2017 at 9:36 AM, Robert Sherry

Re: [R] lines those not started with "rs"

Hi Robert; I do appreciate your advice. Only the first column of the data is text. The rest columns are numeric. Regards, Greg On Mon, Jan 30, 2017 at 9:36 AM, Robert Sherry wrote: > Greg, > > I am assuming that your data is in a text file. R is a good tool but not >

Re: [R] lines those not started with "rs"

Greg, I am assuming that your data is in a text file. R is a good tool but not the tool I would use for this job. The tool I would use is grep. The following command should get you want you want: grep -v "^rs" Bob On 1/30/2017 9:23 AM, greg holly wrote: Hi all; I have a file

[R] lines those not started with "rs"

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, rs1056, rs1076 and so on. I would like to get the lines which do not start with "rs" . Your helps highly appreciated. Regards, Greg [[alternative HTML version