How do I locate the most repeated elements in an array/vector?

For example, we have an array

a = [1 1 1 0 1 1 0 2 2 2]

Given an input of this array, how can I find the number(s) in the array that is/are repeated consecutively most often? i.e. return:

[1 2]

New to matlab and not sure how to do this.

Answer 1

[Bruno Luong]

a = [1 1 1 0 1 1 0 2 2 2];

i = find([true diff(a)~=0 true]);
n = diff(i);
j = find(n == max(n));
b = a(i(j))

b = 1×2

1 2

[Sebastian]

This seems to work really well, and I've taken the time to really understand it as a new user of MATLAB.

However, I'm getting some sort of horzcat error in Cody's test suite. In my own live script I get my expected answer and I don't get any sort of error. Know what might be going on?

Answer 2

[Matt J]

Using this FEX download,

https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vectors

[s,~,r]=groupLims(a);
a(s(  r==max(r) )  )

ans =

1 2