R/gdina_proc_delta_indices.R

In CDM: Cognitive Diagnosis Modeling

## File Name: gdina_proc_delta_indices.R
## File Version: 0.05

gdina_proc_delta_indices <- function(delta, Mj)
{
    I <- length(delta)
    dfr <- NULL
    NP <- 0
    delta_indices <- list()
    for (ii in 1:I){
        v1 <- delta[[ii]]
        Mj_ii <- Mj[[ii]][[2]]
        NV <- length(v1)
        g1 <- NP + 1:NV
        delta_indices[[ ii ]] <- g1
        dfr1 <- data.frame("item"=ii, "np_item"=length(v1),
                    "combi"=Mj_ii, "index"=g1, "val"=v1 )
        dfr <- rbind( dfr, dfr1 )
        NP <- NP + NV
    }
    h1 <- strsplit( paste(dfr$combi), split="-" )
    dfr$order <- unlist( lapply( h1, FUN=function(hh){ length(hh) } ) )
    dfr[ paste(dfr$combi)=="0", "order" ] <- 0
    #---- output
    res <- list( delta_indices=delta_indices, delta_partable=dfr )
    return(res)
}