Do it in a two step process since you want the negation.
> x <- c('file1.xyz', 'file2.xml', 'file3.abc')
> x[-grep("xml$", x)]
[1] "file1.xyz" "file3.abc"
>
On Wed, Oct 1, 2008 at 12:33 AM, zack holden <[EMAIL PROTECTED]> wrote:
>
> Greetings R list,
>
> I am stuck on a simple syntax problem. I
Greetings R list,
I am stuck on a simple syntax problem. I want to list all files in a directory,
excluding files of a certain type. I have tried pattern matching as follows:
a <- list.files(data, full.name = TRUE, pattern != ".xml") # exclude all .xml
files
The warning returns that
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