Hi!
I would like to be able to create formulas automatically. For example, I
want to be able to create a function that takes on two values: resp and
x, and then creates the proper formula to regress resp on x.
My code:
fit.main <- function(resp,x) {
form <- expression(paste(resp," ~ ",paste(x,sep="",collapse=" + "),sep=""))
z <- lm(eval(form))
z
}
main <- fit.main("y",c("x1","x2","x3","x4"))
and I get this error:
Error in terms.default(formula, data = data) :
no terms component
Any suggestions?
Thanks, Maria
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