%Sample solution for problem 24 on page 24 of the text book
%initialize the Rs and Rl vector
Rs = [10, 15, 20, 25];
Rl = [10, 15, 20, 25, 30];
%calculate the length of both vectors
L1 = length(Rs);
%first level of loop, go throught all the source resistence
for i = 1:1:L1
%that is the source resistence we consider in this loop
given_r = Rs(i)
%calculate the ratio value for each pair of (source resistence,
%load resistence) and put them in the vector V
V = Rl./(Rs(i)+Rl).^2;
%find the max ratio and its index
[x, k] = max(V);
%that is the best load resistence for the given source resistence
P(i) = Rl(k);
R(i) = x; % the maximized ratio
end
%prepare the final results
T = cat (1, Rs, P, R)