R help - Apr 2005 - problem with dir() in R-2.1.0?

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

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
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>

On 4/25/05, Ye, Bin <yeb@karmanos.org> 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
  Check out sfsmisc::glob2rx for a nifty function that will convert glob 
style wildcards to regular expressions. I have long th

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