Problem 1259. It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().

Created by Jeremy in Community

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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];

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Last solution submitted on Apr 17, 2019

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2 Comments

goc3 on 22 Jan 2016

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?

li haitao on 25 Oct 2018

This problem is meanless!
The solutions passed are not always fast than repmat, or just cheat(ex. using "tic")

Problem 1259. It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().

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Last 200 Solutions

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Problem 1259. It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().

Solution Stats

Last 200 Solutions

Problem Comments

Recent Solvers30

Suggested Problems

More from this Author7

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