School/Anul 3/Semestrul 2/Calcul numeric/backdiff.m

function t = backdiff(f)
    n = length(f);
    t = zeros(n);
    t(:,1)= f'
    for j = 2:n
      t(j:n,j) = diff(t(j-1:n,j-1));
    endfor
end;