Center of repeatative/duplicate values in Matlab

Hi,

I have a vector lik A = [1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 3 3 ]. I want to get index of centre and its value fo this vector. How can i do that In matlab scirpt ?

The solution of above problem should be.

values = [1 2 3];

Centre_Index = [3 8 14 ];

Thanks in adavnce .

Answer 1

[Ameer Hamza]

x = [1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 3 3 ];
indexes = [1 find(x(2:end) - x(1:end-1))+1 numel(x)];
indexes = floor(movmean(indexes, 2, 'Endpoints', 'discard'));

Answer 2

[dpb]

val=unique(A);
iC=arrayfun(@(x) median(find(A==x)),val);

for your A above

>> val=unique(A);
>> iC=arrayfun(@(x) median(find(A==x)),val)
iC =
     3     8     14
>>