On Tue, Sep 27, 2011 at 5:49 PM, Michael Karol <mka...@syntapharma.com> wrote:
> R Experts:
>
>
>
> I am trying to isolate the numeric value of day from a string that might
> look like "Cycle 1 Day 8" or "Cycle 12 Day 15".
>
>
>
> In essence, what I need is a function that can look at a character
> string and tell me the location within the string where it matches with
> a given string. In this case, where within "Cycle 12 Day 15" is the
> text "Day" located.
>
>
>
> The following works in S+, but I haven't been able to locate a function
> within R that does what regMatchPos does in S+.
>
This extracts the numbers from each string converting them to numeric:
library(gsubfn)
x <- c("Cycle 1 Day 8", "Cycle 12 Day 15")
nums <- strapply(x, "\\d+", as.numeric, simplify = TRUE)
which gives:
> nums
[,1] [,2]
[1,] 1 12
[2,] 8 15
--
Statistics & Software Consulting
GKX Group, GKX Associates Inc.
tel: 1-877-GKX-GROUP
email: ggrothendieck at gmail.com
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
