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## File Name: rasch_mirtlc_mstep_lc.R
## File Version: 0.04
#---- calculate class probabilities
rasch_mirtlc_mstep_lc <- function( pjk, n.k, r.jk, n.jk, G, Nclasses )
{
if (G==1){
pi.k <- n.k / sum( n.k )
pi.k <- matrix( pi.k, nrow=ncol(pjk), ncol=nrow(pjk) )
}
if ( G> 1){
pi.k <- n.k / matrix( colSums(n.k ), nrow=Nclasses, ncol=G, byrow=TRUE)
}
for (cc in 1:Nclasses ){
if (G==1){
pjk[ cc, ] <- r.jk[, cc, 1] / n.jk[, cc, 1]
}
if (G>1){
pjk[ cc, ] <- rowSums( r.jk[, cc, ] ) / rowSums( n.jk[, cc, ] )
}
}
res <- list( pi.k=pi.k, pjk=pjk )
return(res)
}
.m.step.mirtlc.lc <- rasch_mirtlc_mstep_lc
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