BinLists

BinLists[data] gives lists of the elements of data whose values lie in successive integer bins.

BinLists[data, binspec] gives lists of the elements of data whose values lie in successive bins specified by binspec.

BinLists[data -> inds, ...] gives the lists of the labels inds specified by the binning of data.

Examples

Group data by integer bins:

BinLists[{1, 2, 2, 3, 3, 3}]
(* {{1}, {2, 2}, {3, 3, 3}} *)

Custom bin specification:

BinLists[{0.5, 1.2, 1.8, 2.5}, {0, 3, 1}]
(* {{0.5}, {1.2, 1.8}, {2.5}} *)

Please visit the official Wolfram Language Reference for more details.