Sometimes I'm iterating over a list where names are keys into another
data structure, e.g. a related list. Then I can't use lapply as it
does [[]] and loses the name. Then I do something like this:
do.one <- function(ldf) { # list-dataframe item
key <- names(ldf)
meat <- ldf[[1]]
mydf <- some.df[[key]] # related data structure
r.df <- cbind(meat,new.column=computed)
r <- list(xxx=r.df)
names(r) <- key
r
}
then if I operate on the list L of those ldf's not as lapply(L,...), but
res <- lapply(1:length(L),do.one)
Can this procedure be simplified so that names are preserved?
Specifically, can the xxx=..., xxx <- key part be eliminated -- how
can we have a variable on the left-hand side of list(lhs=value)?
Cheers,
Alexy
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