This will identify the elements in l1 that are not in l2. If missingFill is provided, then elements that are in l2, but not in l1 will be returned, assigning missingFill to their values. This might be NULL or "", i.e., some sort of empty value. This function will work on named lists, named vectors and likely on other named classes.

setdiffNamed(l1, l2, missingFill)

## Arguments

l1

A named list or named vector

l2

A named list or named vector (must be same class as l1)

missingFill

A value, such as NULL or "" or "missing" that will be given to the elements returned, that are in l2, but not in l1

## Value

A vector or list of the elements in l1 that are not in l2, and optionally the elements of l2 that are not in l1, with values set to missingFill

## Details

There are 3 types of differences that might occur with named elements: 1. a new named element, 2. an removed named element, and 3. a modified named element. This function captures all of these. In the case of unnamed elements, e.g., setdiff, the first two are not seen as differences, if the values are not different.