[R] write a bunch of objects to files

[Thomas Lumley]

On Mon, 29 Oct 2001, David White wrote:

>
> Hello all,
>
> I've got a bunch of objects I'd like to write to .csv files. For example,
> I have objects conveniently called
>
> n002.csv
> n001.csv
> p103.csv
> .
> .
> .
>
> I tried a loop:
>
> > for(i in ls(pattern="csv"))
> +write.table(i, file=i, sep=",", quote=F)
>
> That, of course, wrote out a bunch of files that contained
>
> x
> 1, n002.csv
>
> Or the like.
>
> How can I get i in the loop above to be an object instead of a string?
>

Use substitute():
 for(i in ls(pattern="csv"))
    eval(substitute(obj, file=fname, sep=",", quote=F),
		list(obj=as.name(i),fname=i)
         )

or get():
 for(i in ls(pattern="csv"))
	write.table(get(i), file=i, sep=",", quote=F)



	-thomas

Thomas Lumley			Asst. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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