[R] Function redefinition - not urgent, but I am curious

From: Alberto Monteiro <albmont_at_centroin.com.br>
Date: Fri, 18 Apr 2008 10:22:22 -0200


This is just my curiousity working.

Suppose I write:

f1 <- function(x) x + 1
f2 <- function(x) 2 * f1(x)
f2(10)
# 22

f1 <- function(x) x - 1
f2(10)
# 18

This is quite obvious. But is there any way to define f2 in such a way that we "freeze" the definition of f1?

f1 <- function(x) x + 1
f2 <- function(x)
# put something here

2 * f1(x)
# probably put something else here too

f2(10)
# 22

f1 <- function(x) x - 1
f2(10)
# 22 - f1 inside f2 does not change

Alberto Monteiro



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