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

Created by Richard Zapor

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

Problem Group

Solution Statistics

7 correct solutions 2 incorrect solutions
Last solution submitted on Jul 30, 2014