Dear list,
I know I have seen this discussed before but I haven't been successful
in searching for "ellipsis", "dots", "..." in the archives. I would
like to filter "..." arguments according to their name, and dispatch
them to two sub-functions, say fun1 and fun2. I looked at lm() but it
seemed more complicated than I need as it modifies the calling
function among other things. What is the best approach for this? My
current version presented below seems very awkward.
Best regards,
baptiste
sessionInfo()
R version 2.9.2 (2009-08-24)
i386-apple-darwin8.11.1
fun1 <- function(col, row){
print(col)
print(row)
}
fun2 <- function(x){
print(x)
}
foo <- function(..., lty=1){
dots <- list(...)
cl <- match.call()
col <- eval.parent(cl$col)
row <- eval.parent(cl$row)
params.fun1 <- c("col", "row")
removed <- na.omit(match(names(cl), params.fun1))
# index whichever arguments were passed to fun1
fun1(col, row)
fun2(dots[seq_along(dots)[-removed]])
}
foo()
foo(col=1)
foo(col=1, row=1, g=2, test = "abc")
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