[R] use object within rda file in for loop

Ivan Calandra ivan.calandra at uni-hamburg.de
Thu May 20 14:13:27 CEST 2010


Dear users,

I would like to process all the lists from all *.rda files that I have 
in one folder.
Up to now, I can load all the *.rda files without any problem.

The problem is when I want to access the list saved within each *.rda 
file (only one list per rda file).

Here is my code:
fpath <- "D:/R"
listnames <- list.files(path=fpath, pattern=glob2rx("*.rda"), 
full.names=FALSE)
for (i in 1:length(listnames)) {
   load(paste(fpath, listnames[i], sep="/"))
   z <- list_in_listnames[i]  ## here is my problem
   **do something on z**
}

It might be really simple, but listnames is a character vector and I 
cannot find how to store the values within each element into z.
I think there would be a function to get and use an object with a given 
pattern in its name. The pattern itself is no problem, the problem is 
the function.
I've tried to look on RSiteSearch but, probably because I couldn't 
figure out the keywords, haven't found anything helpful.
Maybe I'm just on the wrong path to do it or missed something obvious...

I hope my question is clear. If not, please let me know what would help 
you to understand.

Thanks in advance
Ivan

-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php



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