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")
Make one big string out of two smaller strings
vectorization in N
Return the first and last character of a string
Rotate input square matrix 90 degrees CCW without rot90
Determine the number of odd integers in a vector
Create matrix of replicated elements
Calculate the probability that at least two people in a group share the same birthday.
Penny flipping - calculate winning probability (easy)
It's race time! Write a faster function than the test suite call of unique().
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