Var1 =[3、2、5、4、4、4、4、6,2,3,5,5,5,5];
% Var1 = [3, 2, 5, 4, NaN, NaN, NaN, 6, 2, 3, 5, NaN, NaN, NaN]
if (diff(Var1)==0)+1;
Var1 (idx) =南