Hello R-help -
I have
vec <- c("string1", "string2", "string3")
ind <- list(c(1,2),c(1,2,3))
I want "vec" indexed by each vector in the list "ind".
The first element of the list I want would be vec[c(1,2)],
the second element would be vec[c(1,2,3)], like the following.
[[1]]
[1] "string1" "string2"
[[2]]
[1] "string1" "string2" "string3"
Using for loops, this is simple. For fun, I tried to implement it
without a for loop using some combination of *apply() functions and "[".
I succeeded with
myfunc <- function(x) {
do.call("[",list(vec,x))
}
lapply(ind,myfunc)
I was not, however, able to get my desired result without defining my
own dummy function. Can anyone think of a way? As I said, I already
have a way that works, I'm just curious if there is a more 'elegant'
solution that does not rely on my having to define another function.
Seems like it should be possible.
Thanks, Erik Iverson
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