You can find values above 0 with the "find" function (type in command window: doc find). To search inside cells you can "cell2mat" before that or do it in a loop.
In oder to process more persons you better use correct indexing. You could create a cell with size of number of persons and save Similarity values inside the corresponding cells. Then you can loop though the length of a using the values of a.
a = [4 6];
Similarity = cell(2,8);
Similarity{1,a(1)} = {1;0.8;1;1;0.9;0.96;1;-0.8};
Similarity{1,a(2)} = {0.2;0.6;-1;0.4;0.84;-0.96;-0.68;0.7};
for i = 1:length(a)
Person = a(i);
Similarity{2,Person} = find(cell2mat(Similarity{1,Person}) > 0);
end
In this example you create a Similarity cell, the first row is for Similarity values, the second for finding values above 0.
The loop runs from 1 to the length of you a array, the person number is defined as a(i). This is used to save the values to the second row.
Hope this helps Paul
