Hi all, I have the following problem. Inside R, I am trying to run a loop on several files. The data are stored in these files in a peculiar way, thus, at the same time I load the data, I would like to invoke a utility. I do this with "pipe". (The utility I am using is gbget from the package gbutils. It works correctly from shell, and it is not the problem.) The problem is that from within pipe I do not know how to have the loop running. I guess I should manage to unquote the quotation mark inside the pipe for the loop to run, but I do not how to do it. In the following examples, for instance, I would like pipe to interpret the "i" as the file.names of the loop specified above.
# specify the files on which I want to have the loop running file.names <- system("ls ???.gz", intern=TRUE) # Start loop for(i in file.names){ dati <- read.table(pipe("gbget 'i[160](1)' '[37](1)' '[145](1)' |gbget '()D' ")) # [...] some statistical analysis follows [...] } Thanks for your help (hoping I manged to be enough clear), marco -- Marco Grazzi ----- PhD Candidate in Economics and Management LEM-Sant'Anna School of Advanced Studies Piazza Martiri della Liberta', 33 56127 Pisa, Italy Tel. +39-050-883365 Fax +39-050-883344 Web site: https://mail.sssup.it/~grazzi ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.