maddy wrote:
>
> I did not understand what you mean by updating the system. I am new
> user of R and I downloaded R a few days ago. Also I installed the
> required packages for my program(geoR, randomFields), there was just
> one version I could see for the packages.
> The code I am using is as follows
>
> .Random.seed<-1
> N<-300
> phi <- 0.25
>
> get_spherical_map <- function(N,phi) {
>
> sim<-grf(N*N,grid="reg",cov.model="spherical",cov.pars=c(1,phi),method="RF")
> sim$data <- (sim$data - mean(sim$data)) / sd(sim$data)
> local <- array(sim$data, dim=c(N,N))
> }
>
>
You should check the posting guide on
http://www.r-project.org/posting-guide.html
The output of sessionInfo() is important.
The above code is helpful, because we see that the problem comes from a call
to grf, but it does not show the error. Since your data set probably is
large, best construct a dummy data set, or better, use some standard data
set as it comes with grf to show the error.
Dieter
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