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## File Name: rasch_mml2_mstep_one_step.R
## File Version: 1.076
rasch_mml2_mstep_one_step <- function(args0, prob_fun, entry, n.ik,
diffindex, max.increment, numdiff.parm)
{
# gg0 <- Sys.time()
h <- numdiff.parm
val0 <- args0[[entry]]
pjk <- do.call(what=prob_fun, args=args0)
args1 <- rasch_mml2_modify_list_element( x=args0, entry=entry, value=val0+h )
pjk1 <- do.call(what=prob_fun, args=args1)
args1 <- rasch_mml2_modify_list_element( x=args0, entry=entry, value=val0-h )
pjk2 <- do.call(what=prob_fun, args=args1)
# numerical differentiation
res <- rasch_mml2_numdiff_index( pjk=pjk, pjk1=pjk1, pjk2=pjk2, n.ik=n.ik,
diffindex=diffindex, max.increment=max.increment,
numdiff.parm=numdiff.parm )
# update
args0[[entry]] <- args0[[entry]] + res$increment
res$args0 <- args0
#- output
return(res)
}
# cat( " @@@@@ calc probs") ; gg1 <- Sys.time(); print(gg1-gg0) ; gg0 <- gg1
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