[R] reverse string

[Petr PIKAL]

Hi

Quick glance to strsplit help page 

strReverse <- function(x) sapply(lapply(strsplit(x, NULL), rev), paste, 
collapse="")

Regards
Petr


r-help-bounces at r-project.org napsal dne 14.07.2010 12:36:12:

> On Wed, 2010-07-14 at 12:13 +0200, Trafim Vanishek wrote:
> > Dear all,
> > 
> > Are there any functions in R to reverse the order of the string.
> > smth like reverse("abc") to get "cba"?
> 
> > paste(rev(strsplit("abc", split = "")[[1]]), collapse = "")
> [1] "cba"
> 
> If your real data is a vector of strings to reverse then
> 
> strings <- c("abc","abc","abc")
> sapply(strsplit(strings, split = ""),
>        function(str) {paste(rev(str), collapse = "")})
> 
> is one way to do this.
> 
> HTH
> 
> G
> 
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