There is no standard R function `evaluate'. What is its definition?
I suspect you need
kappa <- function(x)
{
xx <- deparse(substitute(x), 500)
a <- table(paste("p", xx, sep=""),
paste("k", xx, sep=""))
...
}
On Thu, 18 Jul 2002, R. Heberto Ghezzo wrote:
> Hello, I have a data base with variables pasthma,kasthma,sex,etc.
> I wrote a program to compute the Kappa statistic between pasthma and
> kasthma.
> Actually "did the child had asthma" answered by the parents and
by the
> child.
> kappa <- function(x) {
> r <- paste("p",evaluate(x),sep="")
> c <- paste("k",evaluate(x),sep="")
> a <- table(r,c)
> ...
> }
> If I call "kappa(asthma)" it works as expected ( "by
me"). But if I call
>
> "kappa(asthma[sex==1])" it does not because of evaluate
> r is "p[" "pasthma" "psex==1" and I
intended to be "pasthma[sex==1]"
> Is there a way around, or I am using the wrong approach?
> Thanks for any help
> .
> Heberto Ghezzo Ph.D.
> McGill University
> Montreal - Canada
>
>
>
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--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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