Ordering

Ordering(list)

calculate the permutation list of the elements in the sorted list.

Ordering(list, n)

calculate the first n indexes of the permutation list of the elements in the sorted list.

Ordering(list, -n)

calculate the last n indexes of the permutation list of the elements in the sorted list.

Ordering(list, n, head)

calculate the first n indexes of the permutation list of the elements in the sorted list using comparator operation head.

See

• Wikipedia - Order theory

Examples

>> Ordering({1,3,4,2,5,9,6})
{1,4,2,3,5,7,6}

>> Ordering({1,3,4,2,5,9,6}, All, Greater)
{6,7,5,3,2,4,1}

Implementation status

• ✅ - full supported

Github

• Implementation of Ordering