R/within.datlist.R

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

## File Name: within.datlist.R
## File Version: 1.07


#########################################################
within.datlist <- function (data, expr, ...)
{
    res <- data
    CALL <- attr(data, "call")
    imp <- res
    M <- length(imp)
    for (ii in 1:M){
        # this function is simply a copy of within.data.frame
        parent <- parent.frame()
        data <- imp[[ii]]
        e <- evalq(environment(), data, parent)
        eval(substitute(expr), e)
        l <- as.list(e)
        l <- l[!sapply(l, is.null)]
        nD <- length(del <- setdiff(names(data), (nl <- names(l))))
        data[nl] <- l
        if (nD)
            data[del] <- if (nD==1)
                NULL
            else vector("list", nD)
        res[[ii]] <- data
    }
    res <- datlist_create(res)
    attr(res,"call") <- CALL
    return(res)
}
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