Hi everyone,
I am not sure this is possible so I would be interested in your
responses. Say I have a variable 'v' with the string "myargument" in and
I have a function 'f' that takes this argument as follows;
f <- function( myargument=5 ) {
... does something...
}
Is there anyway I can say something like;
f( v=10 ) such that it will be evaluated as f( myargument=10 ).
I presume there may be some use eval and substitute but if someone could
point me in the right direction then that would be great.
The end idea is to have a list of m items, declared somewhere else, which
can be evaluated as particular arguments named after their list names
e.g
mylist <- list( "a"=1, "b"=2, "c"=3 )
which can be passed to a function taking arguments a,b, or c and it will
be able to evaluate them accordingly :
long hand this would evaluate to something like
f( a=mylist[["a"]] );
f( b=mylist[["b"]] );
f( c=mylist[["c"]] );
but I would have actually rewritten something like
for ( myvar in names( mylist ) ) {
f( some_clever_substitution_to_act_as_argument(myvar) =
mylist[[ myvar
]] );
}
I hope I have explained myself clearly enough, if not please say so and I
will try and give a better example.
Many thanks for your help
Tom
--
Dr. Thomas McCallum
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