Arguments of a function
You could define a list and then just access the
appropriate elements of that list:
my.f <- function(a, b)
{
x1 = equation 1
x2 = equation 2
x3 = equation 3
L <- list(x1, x2, x3)
y <- L[[a]] + L[[b]]
}
my.f(1,2)
my.f(2,3)
-Peter Ehlers
Lisa wrote:
Dear all,
I have a question about how to set arguments in my own function. For
example, I have a function that looks like this:
my.f <- function(a = x1, b = x2)
{
x1 = equation 1
x2 = equation 2
x3 = equation 3
y = a + b
}
x1, x2, and x3 are temporary variables (intermediate results) calculated
from other variables within the funciton. I want to use two of these three
variables to calculate y, and write R script as below:
my.f(a = x1, b = x2)
or
my.f(a = x2, b = x3)
The error information shows that: ?objects 'x1', 'x2', or 'x3' not found?.
Can anybody help me solve this problem? Thanks in advance.
Lisa
Peter Ehlers University of Calgary 403.202.3921