[R] Pattern match in R

[Gabor Grothendieck]

Try this where ? signifies that the prior character is optional:

dir(pattern = "^Coverage_[1-9]?[0-9]$")


On Tue, Sep 30, 2008 at 10:36 AM, bioinformatics_guy
<wwwhitener at gmail.com> wrote:
>
> I want to make sure this piece of code I wrote is doing what I want it to do.
>
> ll<-function(string)
> {
>        grep(string,dir(),value=T)
> }
>
>
> subdir = ll("Coverage_[1-9][0-9]$")
>
> I basically wrote a little function that would grab all the files of form
> Coverage_[0-99]
>
> The way I wrote it, will it grab Coverage_5 or does it have to have 2
> numbers (10-99)?
>
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