function [err] = specerr(y, C)


% cluster sizes of answers
A1_index = find(C==1);
A2_index = find(C==2);

err = [0, 0];

    for i=1:length(A1_index)
        if (C(A1_index(i)) == 1),
            if (y(A1_index(i)) == 2),
                err(2) = err(2) + 1;
            end;
        end;
    end;
    for i=1:length(A2_index)
        if (C(A2_index(i)) == 2),
            if (y(A2_index(i)) == 1),
                err(1) = err(1) + 1;
            end;
        end;
    end;