On 01.05.2012 19:57, Heiko Neuhaus wrote:
Hi all,
I am trying to create a list of all variable/value combinations in
environment().
When a function with unset arguments is called, the method I have been
using fails with a "missing argument" error. However it should be
possible to simply skip these missing objects in the generation of the
list?
Could anyone recommend me a better way (that does not use a slow
for/eval-combination) to achieve the desired effect?
You can easily reproduce my problem using this code:
------------------------------
test1 <- function(a, b, c)
{
x <- as.list(environment())
print ("hi from test1!")
test2(a = a, b = b, c = c)
You are rying to pass a, b, c here and hence R tries to insert those
into the environment of test2 once it is called, you have not passed
arguments to your test1 call.
Uwe Ligges
}
test2 <- function(a, b, c)
{
# PROBLEM: Why can't I get a list as in test1() here?
x <- as.list(environment())
print ("hi from test2!")
}
test1()
------------------------------
I want my list "x" in test2() to work behave just like "x" in test1().
(In this example the correct list in test2() would be empty).
Thanks a lot for your time.
Best wishes,
Heiko Neuhaus
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