Problem 952. Unique: Enhanced Performance - Avoiding Memory Crash
The Challenge is to create the unique array for a long and wide array.
Difficulties are that the normal unique(a,'rows') function call will suffer a Memory crash on Cody. c=randi(4,9000000,48,'uint8')-1;
The second part of the challenge is Execution Speed.
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
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers15
Suggested Problems
-
Return the largest number that is adjacent to a zero
5331 Solvers
-
Back to basics 19 - character types
261 Solvers
-
Return unique values without sorting
912 Solvers
-
Simple equation: Annual salary
4170 Solvers
-
07 - Common functions and indexing 6
446 Solvers
More from this Author308
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!