[R] doing many commands within R
Uwe Ligges
ligges at statistik.uni-dortmund.de
Mon Jan 10 14:24:04 CET 2005
Cserháti Mátyás wrote:
>
> Dear all,
>
> I'm new to this list, so let me greet everyone.
>
> My problem is that I have several thousand data files which I want to
> perform a lot of R commands on, which are found in a seperate .R script.
>
> Now, what I did was within the R prompt, I used to read in a list of the
> data files.
>
> e.g.
>
> namelist <- readLines("list_of_names",n=-1)
> for (i in 1:100) {
> k <- function(namelist[i])
> write(k,file="outputfile",append=TRUE)
> }
>
> Next, I tried automating the R commands by making a loop. Within the
> loop I called the R-script. Within ecery single loop R called the R-script
> and performs the commands therein (or is supposed to perform it) on
> the actual data file.
>
> After a loop finished, I tried appending the output to an output file.
>
> The problem is that R gives an error message saying that it cannot
> open the input files.
>
> What can I do?
Debug! R has many tools for convenient debugging. See the manuals, R
News, or some good book on R.
What can we do? We don't know anything about a) the files, b) the code
and c) your intention!
Uwe Ligges
> Thanks, Matthew
>
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