R help - May 2010 - use object within rda file in for loop

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. S?ugetiere
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

I've found the answer:
get() is exactly what I need, I completely forgot about this function.

There might be a better way, but that works for me.
Ivan

Le 5/20/2010 14:13, Ivan Calandra a ?crit :
> 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. S?ugetiere
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