R/immer_identifiers_relabel.R

In immer: Item Response Models for Multiple Ratings

## File Name: immer_identifiers_relabel.R
## File Version: 0.194


immer_identifiers_relabel <- function( dat, pid, rater )
{
    pid <- paste( pid )
    rater <- paste( rater )

    dat0 <- data.frame( pid, rater, dat )
    pid_unique <- unique( paste(pid) )
    rater_unique <-  sort(unique( paste( rater ) ))
    dat0$pid <- match( pid, pid_unique )
    dat0$rater <- match( rater, rater_unique )

    # item parameters
    item0 <- data.frame( item=colnames(dat), N_Rat=colSums( 1 - is.na( dat ) ),
                                M=colMeans( dat, na.rm=TRUE )
            )
    # item and rater combinations
    rater_pars0 <- NULL
    I <- ncol(dat)
    R <- length(rater_unique)
    for (ii in 1L:I){
        dfr <- data.frame( item=colnames(dat)[ii], rater=rater_unique, rid=1L:R )
        N_Rat <- stats::aggregate( 1 - is.na(dat[, ii  ]), list(rater), sum )
        M <- stats::aggregate( dat[,ii], list(rater), mean, na.rm=TRUE )
        ind <- match( dfr$rater, M[,1] )
        dfr$N_Rat <- N_Rat[ ind, 2]
        dfr$M <- M[ ind, 2]
        rater_pars0 <- rbind( rater_pars0, dfr )
    }

    res <- list( pid=dat0$pid, rater=dat0$rater, dat=dat0[, - c(1,2), drop=FALSE ],
                pid_unique=pid_unique, rater_unique=rater_unique, item0=item0,
                rater_pars0=rater_pars0 )
    return(res)
}