[Gretl-devel] Re: Rlib daily update!
On Thu, 9 Jul 2009, Allin Cottrell wrote:
Then there's the last point: look-up of R functions. For the
present I've left this as I last described it. You have to "set
R_functions" on to get this. This depends on compiled-in Rlib
support, but it does not depend on setting "R_lib" on. And you
need to prepend "R_" to the function names to have them found.
Update: we're now following Sven's suggestion and using "R.", not
"R_", for the R function namespace.
Unless I'm missing something, there shouldn't be any collisions
with native gretl things. You could save a model named "R"
and refer to it in the context of a "genr" expression but:
* to be a valid gretl construct, the next character after "R."
would have to be '$', to get an accessor such as "R.$coeff", and
* '$' can't be the first character of an R function name, can
it?
So I think we're alright.
New illustration:
open data4-1
set R_functions on
foreign language=R
ols <- function(y,x) {
m <- lm(y~x + 1)
b <- as.matrix(coefficients(m))
invisible(b)
}
end foreign
set messages off
matrix rb = R.ols(price, sqft)
rb
Allin.