Hello,
How would you go about handling the following situation?
This is on R 2.12.0 on Ubuntu 32-bit.
I have a wrapper function to lm. I want to pass in a
subset argument. First, I just thought I'd use "...".
## make example reproducible
set.seed(123)
df1 <- data.frame(age = rnorm(100, 50, 10),
bmi = rnorm(100, 30, sd = 2))
## create a wrapper using "..."
testlm <- function(formula, ...) {
lm(formula, data = df1, ...)
}
> testlm(bmi ~ age, subset = age > 50)
Error in eval(expr, envir, enclos) :
..1 used in an incorrect context, no ... to look in
I found some other examples of this error message,
but couldn't piece together how it fits in with this
example.
Next, I tried specifying a subset argument.
testlm2 <- function(formula, subset) {
lm(formula, data = df1, subset = subset)
}
> testlm2(bmi ~ age, subset = age > 50)
Error in xj[i] : invalid subscript type 'closure'
I also don't understand this one.
Any pointers on if I'm just missing the easy
solution to do what I want? Any explanations
as to the above behavior (I know it has to do
with model.frame, but not sure how) would also
be greatly appreciated!
Thanks!
--Erik
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