Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

Problem 955. ismember: Enhanced Time Performance for 'rows' - Speed Scoring (90% savings)

Created by Richard Zapor

The Challenge is to perform very fast the 'ismember' function for a long and wide array.

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

Input: Array of uint8 of dimensions (m, 16) with values 0:3

Output: Array Equivalent to ismember(A,B,'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

12 correct solutions 4 incorrect solutions
Last solution submitted on Dec 16, 2014

Problem Comments