Problem 956. Unique: Enhanced Performance - Large and Wide Array - Speed Improvement (66% savings)

The Challenge is to perform very fast unique function for a long and wide array.

The data is small integer representing data permutations of items like DNA and Rubik's cube faces.

Input: Array of uint8 of dimensions (m, 48) with values 0:3

Output: Array Equivalent to unique(A,'rows')

Hints:

1) Columns can be merged to form a reduced number of columns 2) Unique has the option to provide an Array and a sorting Index

Solve

Last solution submitted on Sep 07, 2015

performance enhancement speed unique