Dear all,
Does R offer a means by which a function can determine
whether its return value is assigned? I am using R
2.4.1 for Windows.
Suppose what I am looking for is called
"return.value.assigned". Then one might use it like
this
myfunction <- function () {
# Create bigobject here
if (return.value.assigned()) {
bigobject
} else {
summary(bigobject)
}
}
and
x <- myfunction() # bigobject is assigned
myfunction() # summary of bigobject is printed
Octave and MATLAB have the nargout function that does
what I want, and Perl has the wantarray function
detecting the context in which a function is called.
Perhaps match.call() can be made to do what I want,
but, if so, I don't see it in reading the
documentation.
Sincerely,
Paul Laub
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