Problem 39. Which values occur exactly three times?

Solution 225570

Submitted on 30 Mar 2013 by bainhome

This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

bainhome on 30 Mar 2013

hist is a great function indeed.

Guillaume on 17 Jan 2014

histc would be better as this solution would fail on x = [3 3 3] for example.

Test	Status	Code Input and Output
1	Pass	%% x = [1 2 5 2 2 7 8 3 3 1 3 8 8 8]; y_correct = [2 3]; assert(isequal(threeTimes(x),y_correct))
2	Pass	%% x = [1 1 1]; y_correct = [1]; assert(isequal(threeTimes(x),y_correct))
3	Pass	%% x = [5 10 -3 10 -3 11 -3 5 5 7]; y_correct = [-3 5]; assert(isequal(threeTimes(x),y_correct))

Test

Status

Code Input and Output

Pass

%% x = [1 2 5 2 2 7 8 3 3 1 3 8 8 8]; y_correct = [2 3]; assert(isequal(threeTimes(x),y_correct))

Pass

%% x = [1 1 1]; y_correct = [1]; assert(isequal(threeTimes(x),y_correct))

Pass

%% x = [5 10 -3 10 -3 11 -3 5 5 7]; y_correct = [-3 5]; assert(isequal(threeTimes(x),y_correct))