qinmatr: Convert vector into matrix.

In simonsays1980/finmix: An R package for Bayesian estimation of finite mixture distributions

Description

Calling qinmatr() on a vector of dimension r(r+1)/2x1 converts the vector into a symmetric matrix of dimension rxr. This function is used to handle the MCMC sampling output from multivariate finite mixture models. To save storage the symmetric variance-covariance matrices of multivariate mixtures are stored vector form. If the covariance matrices are needed for calculations this function helps to restore these matrices from the storage vectors.

Usage

qinmatr(q)

Arguments

q	A vector of dimension r(r+1)/2x1.

Value

A symmetric matrix of dimension rxr.

See Also

• qinmatrmult()

• qincol()

• qincolmult()

Examples

# Define a vector.
q <- rnorm(n = 6, mean = 0.5, sd = 2)
# Generate the symmetric matrix.
qinmatr(q)

simonsays1980/finmix documentation built on Dec. 23, 2021, 2:25 a.m.