[R] transforming one column into 2 columns

[Dimitris Rizopoulos]

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try this:

dat <- data.frame(Col = c("chr1:71310034", "chr14:23354088",
     "chr15:37759058", "chr22:18262638", "chrUn:31337214",
     "chr10_random:4369261", "chrUn:3545097"))

vals <- strsplit(as.character(dat$Col), ":")
dat$"Col_a" <- sapply(vals, "[", 1)
dat$"Col_b" <- as.numeric(sapply(vals, "[", 2))
dat


I hope it helps.

Best,
Dimitris


----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
      http://www.student.kuleuven.be/~m0390867/dimitris.htm


Quoting joseph <jdsandjd at yahoo.com>:

>
>
> Hello
>
> I have a data frame and one of its columns is as follows:
>
>
>
>
> Col
>
>
> chr1:71310034
>
>
> chr14:23354088
>
>
> chr15:37759058
>
>
> chr22:18262638
>
>
> chrUn:31337214
>
>
> chr10_random:4369261
>
>
> chrUn:3545097
>
>
>
>
>
> I would like to get rid of colon (:) and replace this column
> with two new columns containing the terms on each side of the colon.  
>  The new columns
> should look as follows:
>
>
>
>
> Col_a   Col_b
>
>
> chr1     71310034
>
>
> chr14   23354088
>
>
> chr15   37759058
>
>
> chr22   18262638
>
>
> chrUn   31337214
>
>
> chr10_random  4369261
>
>
> chrUn   3545097
>
>
>
>
>
> Any help will be much appreciated
>
>
> Joseph
>
>
>
>
>
>
>         
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