Hi, I see two problems right off:
On Mon, Nov 7, 2011 at 3:10 PM, Gyanendra Pokharel <gyanendra.pokha...@gmail.com> wrote: > Hello R community, following is my code and it shows error, can some one > fix this error and explain why this occurs? > > gibbs <-function(m,n, theta = 0, lambda = 1){ > alpha <- 1.5 > beta <- 1.5 > gamma <- 1.5 > x<- array(0,c(m+1, 3)) > x[1,1] <- theta > x[1,2] <- lambda > x[1,3]<- n > for(t in 2:m+1){ > x[t,1] <- rbinom(x[t-1,3], 1, x[t-1,1]) The rbinom() command here returns a vector of values, but you're trying to assign it to a single matrix element. You might want to double-check the help for rbinom() again. > x[t,2]<-rbeta(m, x[t-1,1] + alpha, tx[t-1,3] - x[t-1,1] + beta) tx isn't defined, but is probably a typo for x > x[t,3] <- rpois(x[t-1,3] - x[t-1,1],(1 - x[t-1,2])*gamma) > } > x > } > gibbs(100, 10) With a nice short function such as this, it's easy to set your arguments to their default values and actually run the function line by line at the command prompt so you can see whether what is happening is what you expect. Sarah -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.