Cody

# Problem 1237. It's race time! Write a faster function than the test suite call of unique().

Solution 199307

Submitted on 1 Feb 2013
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### Test Suite

Test Status Code Input and Output
1   Pass
%% x = rand(100000, 1); tic y_correct = unique(x); t_unique = toc tic y_myunique = my_unique(x); t_myunique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_myunique)

``` t_unique = 0.0483 t_myunique = 0.0035 ```

2   Pass
%% x = rand(10000, 1); tic y_correct = unique(x); t_unique = toc tic y_my_unique = my_unique(x); t_my_unique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_my_unique)

``` t_unique = 0.0012 t_my_unique = 1.6100e-04 ```

3   Fail
%% x = [1:100000 2 3 4]; tic y_correct = unique(x); t_unique = toc tic y_my_unique = my_unique(x); t_my_unique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_my_unique)

```Error: Dimensions of matrices being concatenated are not consistent. ```