[R] paste: multiple collapse arguments?

Christos Hatzis christos at nuverabio.com
Tue Aug 26 04:20:44 CEST 2008


Try this:

> paste(paste(x, c(" ","\n"), sep=""), collapse="")
[1] "1 2\n3 4\n5 6\n"

-Christos Hatzis

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of remko duursma
> Sent: Monday, August 25, 2008 7:37 PM
> To: r-help at r-project.org
> Subject: [R] paste: multiple collapse arguments?
> 
> 
> Dear R-helpers,
> 
> I have a numeric vector, like:
> 
> x <- c(1,2,3,4,5,6)
> 
> I make this into a string for output to a text file, separated by \n:
> 
> paste(x, collapse="\n")
> 
> Is there a way to alternate the collapse argument? So between 
> the first two elements of x, I want to separate by " ", then 
> by "\n", and so forth.
> The result should then look like:
> "1 2\n3 4\n5 6"
> 
> (This way I get 2 elements of x on each line using 
> writeLines, instead of one or all).
> I could do this in some ugly loop, but surely there is a better way?
> 
> thanks,
> Remko
> 
> 
> 
> 
> 
> 
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