Re: [R] test if files in current folder

From: Prof Brian Ripley <>
Date: Thu, 14 Jun 2007 13:01:14 +0100 (BST)

On Thu, 14 Jun 2007, Vladimir Eremeev wrote:

> runner wrote:
>> I want to test if the files are already in my current folder before I
>> download or copy from somewhere else. What's in my mind is to check if a
>> file is open-able in current folder. Is there a way to do this, like in
>> Perl:
>> if (open()) { do sth}?
>> To put it another way, how to extract all file names in a folder to an
>> array or list?
> ?files
> ?dir
> BTW, Perl has nice -X functions, which allow file testing without explicit
> opening:

which are based on those in 'test' and most Unix shells, as is R's file.test() in package 'utils'.

Brian D. Ripley,        
Professor of Applied Statistics,
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Thu 14 Jun 2007 - 12:27:06 GMT

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