momMix averages the moments of a normal mixture model over MCMC draws.
momMix(probdraw, compdraw)A list containing:
posterior expectation of mean
posterior expectation of covariance matrix
posterior expectation of vector of standard deviations
posterior expectation of correlation matrix
\(R x ncomp\) list of draws of mixture probs
list of length \(R\) of draws of mixture component moments
This routine is a utility routine that does not check the input arguments for proper dimensions and type.
Peter Rossi, Anderson School, UCLA, perossichi@gmail.com.
R                        | is the number of MCMC draws in argument list above. | 
ncomp                    | is the number of mixture components fitted. | 
compdraw                 | is a list of lists of lists with mixture components. | 
compdraw[[i]]            | is \(i\)th draw. | 
compdraw[[i]][[j]][[1]]  | is the mean parameter vector for the \(j\)th component, \(i\)th MCMC draw. | 
compdraw[[i]][[j]][[2]]  | is the UL decomposition of \(\Sigma^{-1}\) for the \(j\)th component, \(i\)th MCMC draw | 
For further discussion, see Chapter 5, Bayesian Statistics and Marketing by Rossi, Allenby, and McCulloch.
rmixGibbs