Hi!

You can try import the file with header = F, and after inform that the first
row is a header.

On this post is some idea:
http://stackoverflow.com/questions/2293131/reading-first-row-as-header-is-easy-what-gives-with-two-rows-being-the-header

On Wed, Aug 17, 2011 at 10:03 AM, Jack Luo <jluo.rhelp@gmail.com> wrote:

> Hi,
>
> I have a silly question regarding the usage of two commands: read.table and
> gregexpr：
> For read.table, if I read a matrix and set header = T, I found that all the
> dash ("-") becomes dots (".")
>
>
> A = read.table("Matrix.txt", sep = "\t", header = F)
> A[1,1]
> # "A-B-C-D".
>
> A = read.table("Matrix.txt", sep = "\t", header = T)
> colnames(A)[1]
> # "A.B.C.D"
>
> Is there a way to use the header = T argument, but still keep the original
> format "A-B-C-D"?
>
> For gregexpr,
> gregexpr("-","A-B-C-D")[[1]]
> #[1] 2 4 6
> #attr(,"match.length")
> #[1] 1 1 1
>
>
> gregexpr(".","A.B.C.D")[[1]]
> [1] 1 2 3 4 5 6 7
> attr(,"match.length")
> [1] 1 1 1 1 1 1 1
>
> Looks like dots means all the characters. Is there a way that I can extract
> the position of the dots specifically?
>
> Thanks,
>
> -Jack
>
>        [[alternative HTML version deleted]]
>
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>


-- 
Atenciosamente,

Raphael Saldanha
saldanha.plangeo@gmail.com

	[[alternative HTML version deleted]]

