try this:

> identical(
+   grep(
+     "^Intensity *[HL]",
+     c("Intensity","Intensity L", "Intensity H", "Intensity Rep1"),
+     invert = TRUE),
+   as.integer(c(1,4)))
[1] TRUE
>



On Wed, May 1, 2013 at 4:37 AM, Johannes Graumann
<johannes_graumann@web.de>wrote:

> Hello,
>
> Banging my head against a wall here ... can anyone light the way to a
> pattern modification that would make the following TRUE?
>
> identical(
>   grep(
>     "^Intensity\\s[^HL]",
>     c("Intensity","Intensity L", "Intensity H", "Intensity Rep1")),
>   as.integer(c(1,4)))
>
> Thank you for your time.
>
> Sincerely, Joh
>
> ______________________________________________
> 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.
>



-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

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