[R] get the content of object in ls()?

[Liaw, Andy]

See ?get.

Andy

> From: Meng Cheng
> 
> Hi,
> I am wirting a R script to process some data routinely and 
> have a problem 
> when try to get the content of object in ls()?
> Here is the script:
> > ls()
> [1] "a" "b"
> [3] "files.num" "fll92_1a_gpr"
> [5] "fll92_1a_gpr_norm" "fll92_1a.gpr.norm.scale"
> [7] "fname" "fullnames"
> [9] "gal" "galfile"
> [11] "i" "readGalfile2"
> [13] "sample1" "ttest1"
> > grep("_gpr$",ls())
> [1] 4
> > ls()[4]
> [1] "fll92_1a_gpr"
> > class(ls()[4])
> [1] "character"
> > class(fll92_1a_gpr)
> [1] "marrayRaw"
> attr(,"package")
> [1] "marray"
> 
> I use the regular expression to get the name of the object I 
> want, which is 
> fll92_1a_gpr, the fourth element in ls() list. 
> But i can't get the content of that object using ls()[4], 
> which gives me a 
> character object(having a double quote). 
> I can still get the data in fll92_1a_gpr by typing 
> fll92_1a_gpr. But this 
> can't be done if I want to implement it in a executable R script.
> Anyone has an idea how to solve this?
> 
> meng
> 
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