R help - Oct 2005 - function agruments

All,

When defining the arguments of a function, is it possible to supply a function
as
an argument?  If so, how is this introduced into the function code as well?

For example, in the body of the function I have:

	result = function(x)

and I'd like to supply either function.1 or function.2.

Please reply directly to afshar@miami.edu

Thanks!
Dave


	[[alternative HTML version deleted]]

It's trivial -- and many R functions do this. ?outer,?sapply for example.

Once can also return a function. ?approxfun for example

Trivial example that shows how to use ... to pass in extra arguments to fun

chooseFun<-function(dat=1:10,fun=mean,...)fun(dat,...)
chooseFun()
x<-rnorm(100)
chooseFun(x,median)
chooseFun(x,hist)
chooseFun(x,hist,col='gray')

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of 
> Afshartous, David
> Sent: Friday, October 07, 2005 11:03 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] function agruments
> 
> All,
> 
> When defining the arguments of a function, is it possible to 
> supply a function as 
> an argument?  If so, how is this introduced into the function 
> code as well?
> 
> For example, in the body of the function I have:
> 
> 	result = function(x)
> 
> and I'd like to supply either function.1 or function.2.
> 
> Please reply directly to afshar at miami.edu
> 
> Thanks!
> Dave
> 
> 
> 	[[alternative HTML version deleted]]
> 
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