On 02/03/2010 5:42 PM, carol white wrote:
Hi,
How to turn a character string into an unevaluated R object? I want to load 
some files in a directory into data matrix R objects. I could do this with 
read.table and assign (see below). Then, I want to turn the character string 
representing a file name (the evaluated expression of i) into an unevaluated R 
object. Basically, I want to create matrices whose names are the same as the 
related file names.

I don't understand what you mean by an "unevaluated R object". The code you give below looks as though it would do the rest of what you describe; what goes wrong with it?

Chees,

Carol
----------------------------
suppose I have

mat1, mat2, mat3 files

v = list.files(".", all.files = F, pattern = "mat")
 for (i in v)
         assign(i, read.table(i, sep = "\t"), pos = 1)

I would leave off "pos = 1" here, though it should be harmless. It will only make a difference if you execute this code inside a function or other local environment.

Duncan Murdoch


then, I want to have 3 objects with the names mat1, mat2, mat3 containing what 
mat1, mat2, mat3 files contain.

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