search for: simmean

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2003 Oct 16
1
Improving efficiency in "outer"-like calculation
Hello, I am doing mcmc=10000 simulations from a posterior distribution of the parameters of a mixture of K=6 normal densities. I have mcmc by K matrices simMeans, simVars and simWeights containing the simulation output: one row for each simulation, one column for each normal component of the mixture. One thing I would like to do is a plot of the posterior predictive density. In order to do that I define a vector x of points at which I want to evaluate thi...
2003 Oct 17
1
Modifying dim attribute of elements of a list
I am creating lists of vectors withing a loop. I also would like to change the dim attribute to the vectors in order to make them matrices. I have tried the following, but it doesn't work... > sim <- c('simMeans','simVars','simWeights') > indexTable <- table(modelIndex) > for (i in sim) { + assign(tmp <- paste(i,'By',sep=''),split(get(i), modelIndex)) + lapply(seq(along=indexTable),function(j) attr(get(tmp)[[j]],'dim') <<- c(indexTable[...