[R] problem with dir() in R-2.1.0?

[Douglas Grove]

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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