On Apr 2, 2005 3:35 PM, Charles Geyer <[EMAIL PROTECTED]> wrote:
> On Fri, Apr 01, 2005 at 05:04:23PM +0200, Dimitris Rizopoulos wrote:
> > if I understand well you want something like this:
> >
> > y <- rnorm(100)
> > p <- rnorm(100)
> > x1 <- rnorm(100)
> > x2 <- rnorm(100)
> > x3 <- rnorm(100)
> > nams <- c("y", "p", paste("x", 1:3, sep=""))
> > ##############
> > dat <- as.data.frame(lapply(nams, get))
> > names(dat) <- nams
> > dat
> >
> > I hope it helps.
>
> Yes, that's it. Thanks.
With that, maybe you could use a notation like this
where the predecessor variables are after the bar:
fo <- cbind(a, b) ~ c + I(c^2)*f | d + e
all.vars(fo) # all variables
all.vars(fo[[2]]) # response variables
all.vars(fo[[3]][[2]]) # explanatory variables
all.vars(fo[[3]][[3]]) # predecessor variables
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