[R] how to loop over a group of variables?

[John Kane]

I think that if you want to apply a simple calculation
to each element something like

df[,3:7]  <- df[,3:7] + 10 

would do what you want.

--- DEEPANKAR BASU <basu.15 at osu.edu> wrote:

> Hi All,
> 
> I have a data frame with a group of variables named
> b1, b2, b3, ..., b18. These variables take the value
> 1, 2 or NA. For each observation, I want to do some
> computation by looping over the values for the group
> of variables: b1 to b18. In STATA I would do:
> 
> forval i=1/18 {
>   --- use b`i' for computation ----
> }
> 
> How can this be done in R?
> 
> Deepankar
> 
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