I try but I don't understand the merge function (Alfonso and Richard solutions). Can you explain ?
since numbers only range from 0 to 3 you may consider each row of A or B as a 16-digit base-4 number and just convert it to a 32-bit integer...
But if we have less restrictions on the input range (for example values between 0 and 255) ?
Jean-Marie, the methodology of converting multiple column value words into a single value has limited but specific applications where value ranges are limited. In the case of DNA sequencing the values can be made numeric 0:3. For ranges up to 255 the width gets limited to stay under the 2^64, or 2^53 limit for double. This challenge was a demonstration of a method to improve performance for functions like ismember.
The Goldbach Conjecture
Connect Four Win Checker
Back to basics 6 - Column Vector
Find the maximum number of decimal places in a set of numbers
Calculate the height of an object dropped from the sky
Find: Faster Alternatives for Large Sorted/Unique Vectors
USC Fall 2012 ACM: Rover Maze
GJam 2014 China Rd A: Read Phone Number
PACMAT - Ghosts Random; 3 Lives
Knot Count - Speed
Find the treasures in MATLAB Central and discover how the community can help you!
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office