Question

I’m trying to write a function in R that will return as its output, an one output from a previous function. The previous function returns a list of 3 different things.

So far the only way I’ve worked out how to do this is completely copy and paste the original function, and get it to return only one answer, but surely there is a shorter way in which to do this?

Answer 1

If the original function is named foo(), as in

foo <- function ( something ) {
  # some code
  return(list(residuals, residualssquared,tss))
}

then just do

bar <- function ( something ) {
  return ( foo(something)$tss )
}

or simply use foo(something)$tss to directly access the tss component of the return value of foo(). There is really no need to wrap another function bar() around foo().