Nothing
### This file contains functions for log densities of beta and normal.
### These will majorly update .MixfMRIEnv$W.gbd.
logbetanorm.I <- function(PARAM, i.k){
# log of beta density.
ret <- dbeta(.MixfMRIEnv$PV.gbd,
PARAM$BETA[[i.k]][1], PARAM$BETA[[i.k]][2], log = TRUE)
# log of normal density.
if(PARAM$p.X > 0){
for(i.p in 1:PARAM$p.X){
ret <- ret + dnorm(.MixfMRIEnv$X.gbd[, i.p],
mean = PARAM$MU[i.p, i.k],
sd = PARAM$SIGMA[[i.k]]$U[i.p], log = TRUE)
}
}
# update global matrix.
.MixfMRIEnv$W.gbd[, i.k] <- ret
invisible()
} # End of logbetanorm.I().
logbetanorm.V <- function(PARAM, i.k){
# log of beta density.
ret <- dbeta(.MixfMRIEnv$PV.gbd,
PARAM$BETA[[i.k]][1], PARAM$BETA[[i.k]][2], log = TRUE)
# log of normal density.
if(PARAM$p.X > 0){
ret <- ret + dmvn.chol(.MixfMRIEnv$X.gbd, PARAM$MU[, i.k],
PARAM$SIGMA[[i.k]]$U, log = TRUE)
}
# update global matrix.
.MixfMRIEnv$W.gbd[, i.k] <- ret
invisible()
} # End of logbetanorm.V().
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