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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