Message-ID: <Pine.LNX.4.58.0504251404480.16985@echidna.fhcrc.org>
Date: 2005-04-25T21:07:09Z
From: Douglas Grove
Subject: problem with dir() in R-2.1.0?
In-Reply-To: <F48D41FE92211245B2DE3972D22432E102B4E01C@exch2000.kci-net.karmanos.org>
The new version of R has begun enforcing rules on regular expressions.
Your pattern is not a valid regular expression, hence it no longer works.
The meaning of '*' is with respect to a preceding character, hence it is
ill-defined without one.
On Mon, 25 Apr 2005, Ye, Bin wrote:
> Hi,
>
> I always use dir(pattern="*.RData") in all the earlier version of R (1.8, 1.9, 2.0.1).
>
> Error messege is as below:
> Error in list.files(path, pattern, all.files, full.names, recursive) :
> invalid 'pattern' regular expression
>
> Does anyone have an idea what's going on? How should I define the pattern I need in R-2.1.0?
>
> Thanks!
>
>
> Bin
>
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