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
Solution Stats
Solution Comments
Show commentsProblem Recent Solvers19
Suggested Problems
-
How to find the position of an element in a vector without using the find function
2692 Solvers
-
Count from 0 to N^M in base N.
234 Solvers
-
Back to basics 20 - singleton dimensions
265 Solvers
-
Compute a dot product of two vectors x and y
971 Solvers
-
82 Solvers
More from this Author294
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!