R help - Aug 2008 - how to get no of pdf files in a particular directory

Hi

     Lets say,

 
Dir<-"/var/www/html/celnet/users/cxadmin/FlowDuration_DataVolume/fld_01_
08_18_08"

          There will be pdf and/or csv files.

 

        I want to know how many *.pdf files are  there in that
directory.

 

 

     How can I get using R commands.

 

       

         

Thanks

K.Ravichandra

 

 


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2008/8/18 Kurapati, Ravichandra (Ravichandra)
<ravichandra.kurapati at alcatel-lucent.com>:
>
Dir<-"/var/www/html/celnet/users/cxadmin/FlowDuration_DataVolume/fld_01_
> 08_18_08"
>
>          There will be pdf and/or csv files.
>
>        I want to know how many *.pdf files are  there in that
> directory.
>     How can I get using R commands.
>
 length(list.files(Dir,pattern="\\.pdf$"))

 Note that pattern is a regexp matching .pdf at the end of a string,
not a glob ("*.pdf").

 You could use Sys.glob, but list.files looks easier.

Barry

length(Sys.glob(file.path(Dir, "*.pdf)))

or use the 'pattern' argument of list.files()

or use system(paste("ls", file.path(Dir, "*.pdf), "| wc
-l"), intern=TRUE)

On Mon, 18 Aug 2008, Kurapati, Ravichandra (Ravichandra) wrote:
> Hi
>
>     Lets say,
>
>
Dir<-"/var/www/html/celnet/users/cxadmin/FlowDuration_DataVolume/fld_01_
> 08_18_08"
>
>          There will be pdf and/or csv files.
>
>        I want to know how many *.pdf files are  there in that
> directory.
>
>     How can I get using R commands.
>
> Thanks
>
> K.Ravichandra
-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

On Mon, 18 Aug 2008, Kurapati, Ravichandra (Ravichandra) wrote:
> Let's say,
>
>
Dir<-"/var/www/html/celnet/users/cxadmin/FlowDuration_DataVolume/fld_01_
> 08_18_08"
>
> There will be pdf and/or csv files.
> I want to know how many *.pdf files are there in that directory.
>
> How can I get using R commands.
>
R> pdf.re <- ".*[pP][dD][fF]$"
R> files <- list.files(path=Dir, pattern=pdf.re)
R> length(files)

----------------------------------------------------------
SIGSIG -- signature too long (core dumped)

> Let's say,
> 
>
Dir<-"/var/www/html/celnet/users/cxadmin/FlowDuration_DataVolume/fld_0
> 1_
> 08_18_08"
> 
> There will be pdf and/or csv files.
> I want to know how many *.pdf and/or csv files are there in that
directory.
> 
> How can I get using R commands.
> 
 

 

Thanks

K.Ravichandra

 

 


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