[R] how to get how many lines there are in a file.

[Liaw, Andy]

> From: Marc Schwartz
> 
> On Mon, 2004-12-06 at 22:12 +0800, Hu Chen wrote:
> > hi all
> > If I wanna get the total number of lines in a big file 
> without reading
> > the file's content into R as matrix or data frame, any methods or
> > functions?
> > thanks in advance.
> > Regards
> 
> See ?readLines
> 
> You can use:
> 
> length(readLines("FileName"))
> 
> to get the number of lines read.
> 
> HTH,
> 
> Marc Schwartz


On a system equipped with `wc' (*nix or Windows with such utilities
installed and on PATH) I would use that.  Otherwise length(count.fields())
might be a good choice.

Cheers,
Andy