Learn R Programming

ff (version 4.5.0)

unsort: Hybrid Index, internal utilities

Description

Non-documented internal utilities that might change

Usage

unsort(x, ix)
unsort.hi(x, index)
unsort.ahi(x, index, ixre = any(sapply(index, function(i) {
    if (is.null(i$ix)) {
        if (i$re) TRUE else FALSE
    } else {
        TRUE
    }
})), ix = lapply(index, function(i) {
    if (is.null(i$ix)) {
        if (i$re)
            orig <- rev(seq_len(poslength(i)))
        else orig <- seq_len(poslength(i))
    }
    else {
        orig <- i$ix
    }
    orig
}))
subscript2integer(x, maxindex = NULL, names = NULL)

Value

undefined

Arguments

x

x

ix

ix

ixre

ixre

index

index

maxindex

maxindex

names

names

Author

Jens Oehlschlägel

Details

These are utility functions for restoring original order after sorting. For now we 'mimic' the intuitive but wrong argument order of match() which should rather have the 'table' argument as its first argument, then one could properly method-dispatch on the type of table. xx We might change to proper 'unsort' generic, but then we have to change argument order.

See Also

hi, as.hi