MATLAB: Not enough input arguments.

b)function [u] = suitem(an] = size(a) u=u1 for i = 1 : nb u= a*u +b end endnb) [nu1

function [u] = suitem(A,b,u1,nb) 
[n,n] = size(A) ;
 u=u1  for i = 1 : nb 
u= A*u +b  
end 
end

Best Answer

Other than having to fix the for being on the same line, it looks okay to me.
suitem(rand(8,8), rand, rand, 7)
ans = 8×8
    5.9738    5.7873    6.4540    5.8167    5.9296    5.6976    6.9287    6.5290
    6.3011    6.1045    6.8077    6.1355    6.2547    6.0097    7.3086    6.8868
    6.9830    6.7651    7.5445    6.7995    6.9317    6.6601    8.0996    7.6322
    6.8662    6.6519    7.4183    6.6857    6.8157    6.5487    7.9641    7.5045
    7.3179    7.0894    7.9063    7.1255    7.2641    6.9795    8.4879    7.9982
    7.8525    7.6073    8.4838    7.6460    7.7947    7.4894    9.1080    8.5824
    5.8720    5.6887    6.3441    5.7176    5.8287    5.6005    6.8108    6.4178
    5.0072    4.8508    5.4098    4.8755    4.9704    4.7757    5.8077    5.4726

●
function [u] = suitem(A,b,u1,nb) 
    [n,n] = size(A);
    u=u1;
    for i = 1 : nb 
        u= A*u +b;
    end 
end
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