R/cdm_calc_increment.R

In CDM: Cognitive Diagnosis Modeling

## File Name: cdm_calc_increment.R
## File Version: 0.142

cdm_calc_increment <- function( d1, d2, max.increment, eps=1E-10, adj_fac=.98, type=1 )
{
    increment <- d1 / ( abs( d2 + eps ) )
    increment[ is.na(increment) ] <- 0
    #--- vector increment
    if (is.vector(increment) ){
        increment <- cdm_trim_increment( increment=increment, max.increment=max.increment,
                        type=type )
    }
    #--- matrix increment
    if (is.matrix(increment) ){
        K <- ncol(increment)
        for (kk in 1:K){
            increment[,kk] <- cdm_trim_increment( increment=increment[,kk],
                                max.increment=max.increment, type=type)
        }
    }
    #--- adjust maximum increment
    max.increment <- max(abs(increment)) / adj_fac
    #--- output
    res <- list(increment=increment, max.increment=max.increment)
    return(res)
}