Problem 1259. It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().
Given an input element x, and the dimensions, (m, n) return a matrix of size m x n filled with element x. This must be done in less than half the time that repmat(x, m, n) takes. This is the sequel to http://www.mathworks.com/matlabcentral/cody/problems/1237-it-s-race-time-write-a-faster-function-than-the-test-suite-call-of-unique.
Example: Input: repl_mat(2, 2, 5) Output: [2, 2, 2, 2, 2; 2, 2, 2, 2, 2];
Solution Stats
Problem Comments
-
2 Comments
This doesn't seem to be possible anymore: http://stackoverflow.com/questions/28722723/matlab-bsxfun-no-longer-faster-than-repmat. Any chance of updating the problem with looser time tolerances?
This problem is meanless!
The solutions passed are not always fast than repmat, or just cheat(ex. using "tic")
Solution Comments
Show commentsProblem Recent Solvers21
Suggested Problems
-
3711 Solvers
-
3380 Solvers
-
406 Solvers
-
How long is the longest prime diagonal?
399 Solvers
-
207 Solvers
More from this Author7
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!