Message-ID: <OFD5A9F863.8E1E25FF-ON85256CFE.00785D4D@rtp.epa.gov>
Date: 2003-04-04T22:05:59Z
From: Setzer.Woodrow@epamail.epa.gov
Subject: creating function bodies using body()
I'm having trouble figuring out how to create a function using "body<-"
(). The help file for body() says that the argument should be a list of
R expressions. However if I try that I get an error:
> tmpfun <- function(a, b=2){}
> body(tmpfun) <- list(expression(z <- a + b),expression(z^2))
Error in as.function.default(c(formals(f), value), envir) :
invalid formal argument list for "function"
Can someone give me a simple example for doing this? Thanks!
R. Woodrow Setzer, Jr. Phone: (919) 541-0128
Experimental Toxicology Division Fax: (919) 541-4284
Pharmacokinetics Branch
NHEERL B143-05; US EPA; RTP, NC 27711