[R] Referring to an object by a variable containing its name: 6 failures

[Eik Vettorazzi]

Hi,
maybe I did not get the point, but get() does exactly what you want:

whatIwant = 2
nomdeplume = "whatIwant"
get(nomdeplume)

cheers

Am 16.09.2011 16:09, schrieb Timothy Bates:
> On 16 Sep 2011, at 1:49 AM, andrewH wrote:
>>> I'm trying to make a function that takes column names then 
>>> using the variable colName, containing the name of
>>> the column,  to refer to the column itself
> rmailbox at justemail.net said
>> What am I missing about your inquiry: It seems like x[ , colName ] should work:
> 
> I think what is being asked is to treat the value of a variable not as a string (which work fine in your example), but as a variable name
> 
> In php you’d use $$ to dereference by name
> 
> $whatIwant = 2
> $nomdeplume = "whatIwant"
> $$nomdeplume
> 2
> 
> I’ve not come across this functionality in R: would be great if it exists
> 
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Eik Vettorazzi

Department of Medical Biometry and Epidemiology
University Medical Center Hamburg-Eppendorf

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