Dear All, I saw a couple of annoucement on work relating to mixed logit model and I wonder if this is coded in S+ now? Does anyone know if this is in Splus 7? ** Steve Su (s.su@qut.edu.au) Postdoctor
Dear All, I wonder if there are simpler ways of doing the following: Lets say I got three matrices: jj<-matrix(c(0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0,
Thanks for the elegant solution. The original post got a posting error, ind should come before k, 'which' is a function in Splus. n.row<-dim(jj)[1] n.col<-dim(jj)[2] PB<-matrix(0,ncol=n.col,nrow=n.ro
Dear All, I was using optim on a function which output infeasible solutions as NA, but somehow optim seems to bypass this and give me an "objective value" which I don't know how it is calculated. Doe
Dear Professor Ripley, Thank you for your kind reply. I was using Nelder Mead algorithm of the optim function. I am not sure why putting infeasiable region as Inf does not seem to work either. It all
Dear All, I am probably a Splus dummy, but is there a nice way of calculating the mid point of a series? I am using the following solution which works but I like to think there are better solutions:
Dear All, I am wondering what is the rationale behind the the pretty function in Splus? It does not always produce the exact number of intervals required but I am not sure how does it makes the data
Dear All, Worked it out now :) Sorry about the earlier e mail! ** Steve Su (s.su@qut.edu.au) PhD student. School of Accountancy Queensland University of Technology Postal Address: Steve Su, School of
Dear All, I am wondering what are people's general perception towards goodness of fit statistics to compare observed distribution with the theoretical distribution? Do people generally recommend the
Dear All, I am wondering what is the method solveQP in S+NUOPT use to account for inequality constrained optimization problems? Do they use log barrier method or some other penalty methods? I am also
Dear All, I apologise for this question is not directly relate to Splus, but I am wondering if anyone can give me a useful reference for finding the product of two distributions- one continuous and o
Dear All, Is there an elegant method to paste 30 graphs generated from Splus into Word on a page for a graph basis? I suppose one could copy and paste but it seems to be a bit mundane, as I have a lo