R/List2nestedList.R

In miceadds: Some Additional Multiple Imputation Functions, Especially for 'mice'

## File Name: List2nestedList.R
## File Version: 0.08

###########################################
# convert a List into a nestedList
List2nestedList <- function( List, N_between, N_within=NULL,
        loop_within=TRUE ){

    M <- length(List)
    if ( is.null(N_within) ){
        N_within <- floor(M / N_between)
    }

    nl <- as.list(1:N_between)
    M2 <- N_between * N_within
    for (bb in 1:N_between){
        nl[[bb]] <- as.list(1:N_within)
    }

    #****************************
    # loop within
    bb <- 1
    ww <- 1
    if ( loop_within){
        for (mm in 1:M2){
            nl[[bb]][[ww]] <- List[[ mm ]]
            if ( ww < N_within){
                ww <- ww + 1
            } else {
                bb <- bb + 1
                ww <- 1
            }
        }
    }
    #****************************
    # loop between
    if ( ! loop_within){
        for (mm in 1:M2){
            nl[[bb]][[ww]] <- List[[ mm ]]
            if ( bb < N_between){
                bb <- bb + 1
            } else {
                ww <- ww + 1
                bb <- 1
            }
        }
    }
    return(nl)
}
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