On 12-08-29 04:00 PM, Peter Langfelder wrote:
On Wed, Aug 29, 2012 at 3:36 PM, Peter Langfelder
<peter.langfel...@gmail.com> wrote:
Hi all,
is there a way to extract the name of a function, i.e. do the reverse
of match.fun applied to a character string? I would like to print out
the name of a function supplied to another function as an argument.
For example:
myFunc = function(x) { x+1 }
applyFunc = function(fnc, x)
{
fnc = match.fun(fnc)
fnc(x)
}
Is there a way to obtain "myFunc" from the argument fnc in applyFnc
the following call is issued?
applyFnc(myFunc, 1)
...or am I missing the basic fact that since arguments to functions in
R are passed by copy, the name is lost/meaningless?
You can pass the function name as a string.
applyFunc = function(fun, x)
{
fnc = match.fun(fun)
fnc(x)
print(fun)
}
applyFunc("myFunc", 1)
[1] "myFunc"
PS : avoid renaming the name of your argument within the function ("fnc
= match.fun(fnc)").
Cheers,
Eloi
Thanks,
Peter
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--
Eloi Mercier
Bioinformatics PhD Student, UBC
Paul Pavlidis Lab
2185 East Mall
University of British Columbia
Vancouver BC V6T1Z4
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
