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

[jim holtman]

You can use 'get':

for (i in 1:18){
    .temp <- get(paste('b', i, sep=''))  # get data to use
    .....  now use .temp in rest of calculations
}

On 10/24/07, 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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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?