[R] use list elements to subtract values from the dataframe

[jim holtman]

What you want is:

wf[[fl[1]]]

'fl' is a vector, so you should only be using a single '[' for indexing.

On Wed, May 7, 2008 at 3:20 AM, Dirkheld <dirk.bollen at soc.kuleuven.be> wrote:
>
> Hi,
>
> I have a dataframe wf existing of a header with different labels and beneath
> the values of those labels :
> wf:
> label1  label2  ...
> 0,45    0,21
> 0,10    0,45
> ....      ....
>
> I have a list
> fl <- c("label2","label3",..)
>
> Isn't possible to use the list elements in the list in order to subtract
> values from the dataframe? like :
> wf$fl[[1]]
> When I do in R I get :NULL
> fl[[1]] gives  "label2"  so no problem here...
>
> While wf$label1 works fine.
>
>
>
> --
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>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?