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
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