function [N] = fiveyearsmeanfunction (yearm,Tm)

M = [yearm,Tm];


s = size (M);
n = s (1);

N= [];

for i = 3 : n - 2
    
    year = M (i,1);
    T = M (i,2);
    
    t2 = M (i-2,2);
    t1 = M (i-1,2);
    T1 = M (i+1,2);
    T2 = M (i+2,2);
    
    mat = [t2;t1;T;T1;T2];
    
    Tmean = nanmean (mat);
   
    
    N = [N;year,Tmean];
    
end