On Thu, Oct 11, 2007 at 02:17:14PM -0400, Dale Steele wrote:
> Running the function below, tested using the cardiff dataset from
> splancs generates the following error. What changes do I need to
> make to get the function to work? Thanks. --Dale
>
> > gen.rpoints(events, poly, 99)
> > rpoints
> Error: object "rpoints" not found
Looks like the variable rpoints does not exist.
> gen.rpoints <- function(events, poly, nsim){
> rpoints <- array(0, dim=c(nrow(events),2,nsim))
> for (i in 1:nsim) {
> rpoints[, ,i] <- csr(poly, nrow(events))
> }
> }
OK – so I guess this function is intended to create the variable
rpoints. And it does – but the variable exists only inside the function.
You could fix this by using the <<- operator but it is much cleaner to add
return(rppoints) as the last line of your function and then call it like
this:
rppoints <- gen.rpoints(events, poly, 99)
cu
Philipp
--
Dr. Philipp Pagel Tel. +49-8161-71 2131
Lehrstuhl für Genomorientierte Bioinformatik Fax. +49-8161-71 2186
Technische Universität München
Wissenschaftszentrum Weihenstephan
85350 Freising, Germany
and
Institut für Bioinformatik / MIPS
GSF - Forschungszentrum für Umwelt und Gesundheit
Ingolstädter Landstrasse 1
85764 Neuherberg, Germany
http://mips.gsf.de/staff/pagel
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