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bayesm (version 3.1-6)

momMix: Compute Posterior Expectation of Normal Mixture Model Moments

Description

momMix averages the moments of a normal mixture model over MCMC draws.

Usage

momMix(probdraw, compdraw)

Value

A list containing:

mu

posterior expectation of mean

sigma

posterior expectation of covariance matrix

sd

posterior expectation of vector of standard deviations

corr

posterior expectation of correlation matrix

Arguments

probdraw

\(R x ncomp\) list of draws of mixture probs

compdraw

list of length \(R\) of draws of mixture component moments

Warning

This routine is a utility routine that does not check the input arguments for proper dimensions and type.

Author

Peter Rossi, Anderson School, UCLA, perossichi@gmail.com.

Details

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

References

For further discussion, see Chapter 5, Bayesian Statistics and Marketing by Rossi, Allenby, and McCulloch.

See Also

rmixGibbs