get_uniques_and_positions#

skrough.unique.get_uniques_and_positions(values: ndarray) → Tuple[ndarray, ndarray][source]#

Get unique elements of an array and indices of first occurrences of these values.

Get unique elements (reported in ascending order) of the input array values along with the positions/indices in the input array for which unique values appear for the first time.

Parameters:

values – Input array.

Returns:

Result is a 2-element tuple consisted of the following elements

  • unique values (reported in ascending order) of the input array

  • position/indices in the input array for which unique values appear for the first time

Examples

>>> get_uniques_and_positions(np.array([2, 7, 1, 8, 2, 8, 1]))
(array([1, 2, 7, 8]), array([2, 0, 1, 3]))
>>> get_uniques_and_positions(np.array([3, 3, 2, 1, 3]))
(array([1, 2, 3]), array([3, 2, 0]))
>>> get_uniques_and_positions(np.array([1, 3, 3, 2]))
(array([1, 2, 3]), array([0, 3, 1]))