Message-ID: <494FDAE3.2060600@stats.uwo.ca>
Date: 2008-12-22T18:22:27Z
From: Duncan Murdoch
Subject: Globbing Files in R
In-Reply-To: <giolev$sra$1@ger.gmane.org>
On 12/22/2008 1:14 PM, Earl F Glynn wrote:
> Gundala Viswanath wrote:
>
>> Typically Perl's idiom would be:
>>
>> __BEGIN__
>> @files = glob("/mydir/*.txt");
>>
>> foreach my $file (@files) {
>> # process the file
>> }
>> __END__
>
> Something like this has been suggested in R-help before:
>
> files <- dir()
> results <- lapply(files, yourprocessing())
>
> The dir function has path and pattern arguments to select the set of
> files you want.
>
> This works fine when there are no problems, but often I'll use a for
> loop so problem files can be dealt with differently when necessary.
>
> Perhaps something like this:
>
> ProcessList <- dir(pattern="InPerson*")
>
> for (i in 1:length(ProcessList))
Remember to use seq_along() instead: ProcessList might be length 0.
Duncan Murdoch
> {
> filename <- ProcessList[i]
> . . .
> }
>
>
> efg
>
> Earl F Glynn
> Overland Park, KS
>
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