On Wed, 15 Jul 2009, escher2079 wrote:
Hi,
I know this is a simple question, but I've been having problems passing
additional arguments through '...'. It is not matching the arguments
correctly if the permanent argument of the function begins with the same
letter as the additional argument. The following example will help show what
I mean:
fun.tester <- function(abc,...){
+ print(abc)
+ }
But if I input:
fun.tester(0,a=1)
It returns the value '1' for abc. It does however, work properly if I input:
fun.tester(abc=0,a=1)
I think you'll need to dig into sys.call() and match.call() and put
together your own matching scheme to force a function to first match by
position and then match all else by name.
If match.call() is unfamiliar to you, it is advised to read the first 10
lines of lm().
HTH,
Chuck
p.s. every argument that comes AFTER '...' in the formals must match
exactly. Perhaps this would help you.
It seems like a simple problem, so I would assume I'm doing something
stupid, but I haven't been able to find a solution anywhere. Thanks!
--
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Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
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