[R] questions about string handling

[Peter Alspach]

Tena koe Karena

See ?sub and ?gsub

HTH ...

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of karena
> Sent: Thursday, 5 August 2010 12:56 p.m.
> To: r-help at r-project.org
> Subject: [R] questions about string handling
> 
> 
> Hi, I have a question about the data handling. I have a dataset as
> following:
> ID         snp1        snp2           snp3
> 1001     0/0           1/1            1/1
> 1002     2/2           3/3            1/1
> 1003     4/4           3/3            2/2
> 
> I want to convert the dataset to the following format:
> ID        snp1         snp2           snp3
> 1001     00            AA             AA
> 1002     GG            CC            AA
> 1003     TT            CC            GG
> 
> thing to be done:
> 1) take the '/' off
> 2) replace the numbers with letters, 0 not change.   1=A, 2=G, 3=C, 4=T
> 
> what is the most efficient way to do it?
> 
> thanks you very much,
> 
> karena
> --
> View this message in context: http://r.789695.n4.nabble.com/questions-
> about-string-handling-tp2314335p2314335.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> R-help at 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.