Hi Jeff and John,
Thank you for your response.
In each folder, I am expecting a single file name (either dat or
dat.csv).v so will this work?
Is the following correct?
fns <- list.files(mydir)
if (is.element(pattern="dat(\\.[^.]+)$",fns ))
Thank you again.
On Mon, Nov 28, 2016 at 7:20 PM, Jeff Newmiller
<jdnew...@dcn.davis.ca.us> wrote:
> No, and yes, depending what you mean.
>
> No, because you have to supply the file name to open it... you cannot
> directly use wildcards to open files.
>
> Yes, because the list.files function can be used to match all file names
> fitting a regex pattern, and you can use those filenames to open the files.
>
> E.g.
>
> fns <- list.files( pattern="dat(\\.[^.]+)$" )
> dtaL <- lapply( fns, function(fn){ read.csv( fn, stringsAsFactors=FALSE ) } )
>
> If you only expect one file to be in any given directory, you can skip the
> lapply and just read the file, or you can extract the data frame from the
> list using dtaL[[ 1 ]].
>
> ?list.files
> ?regex for help on patterns
> --
> Sent from my phone. Please excuse my brevity.
>
> On November 28, 2016 2:23:23 PM PST, Ashta <sewa...@gmail.com> wrote:
>>Hi all,
>>
>>I have a script that reads a file (dat.csv) from several folders.
>>However, in some folders the file name is (dat) with out csv and in
>>other folders it is dat.csv. The format of data is the same(only the
>>file name differs with and without "csv".
>>
>>Is it possible to read these files depending on their name in one?
>>like read.csv("dat.csv"). How can I read both type of file names?
>>
>>Thank you in advance
>>
>>______________________________________________
>>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>>PLEASE do read the posting guide
>>http://www.R-project.org/posting-guide.html
>>and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
