On Aug 26, 2010, at 8:15 AM, Gabor Grothendieck wrote:
On Thu, Aug 26, 2010 at 6:16 AM, Dimitri Shvorob
<dimitri.shvo...@gmail.com> wrote:
grep("f[0-9]+=", "f1=5,f22=3,", value = T)
[1] "f1=5,f22=3,"
How do I make the line output c("f1", "f22") instead? (Actually,
c(1,22)
would be even better).
strapply in gsubfn extracts matches based on content rather than
delimiters. See home page for more info http://gsubfn.googlecode.com
library(gsubfn)
x <- "f1=5,f22=3,"
strapply(x, "f\\d+")[[1]]
[1] "f1" "f22"
I read the request as for c(1,22) offered without quotes so t emeaning
was obscure but perhaps this is what OP wanted:
as.numeric( strapply(x, "f(\\d+)=")[[1]] )
[1] 1 22
# or
> as.numeric(unlist(strapply(x, "f(\\d+)=")))
[1] 1 22
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