[R] Finding multiple characters in the same string

[Vladimir Eremeev]

> gregexpr("[0-9]","this1is2a3test")
[[1]]
[1]  5  8 10
attr(,"match.length")
[1] 1 1 1

> unlist(gregexpr("[0-9]","this1is2a3test"))
[1]  5  8 10


Tom.O wrote:
> 
> I have this problem where I need to find if there is any numbers in a
> string, this is no problem if theres only one number per string. I would
> then simply use the regexpr() funtion togheter with the substring function
> to extract the number. But regexpr only picks one number per string either
> from the beginning or the end, but not multiple. Can this be done? And how
> 
> for example
> My string <- "this1is2a3test"
> 
> The result I want is an vector of c(1,2,3)
> 

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