how to choose the best value of a function

v=[1,1,1,0,0,0,0,0,0,0;0,0,0,1,1,1,0,0,0;0,0,0,0,0,0,0,1,1,1];
v1=perm(v);
for a=1:10;
for i=1:3
G=G=sum(h(a,i)+h(i,a))*v -sum(h(a,i)+h(i,a))*v1
Gain=G(v1,v,M);
disp(Gain),
end 
end

I need to have the value of Gain of every permutation and after choose the permutation which have the least Gain value. Thank you for helping me

Answer 1

[Image Analyst]

This is standard programming stuff. Have variables called best_a, best_i, and best_gain. Then whenever the Gain is less than best_gain, store the current values in the best values. Something like:

v=[1,1,1,0,0,0,0,0,0,0;0,0,0,1,1,1,0,0,0;0,0,0,0,0,0,0,1,1,1];
v1=perm(v);
best_gain = inf;
for a=1:10;
  for i=1:3
    % What the heck is the next line!?!?!?!
    G=G=sum(h(a,i)+h(i,a))*v -sum(h(a,i)+h(i,a))*v1
    Gain(i, a) = G(v1,v,M);
    disp(Gain(i, a));
    % Save parameters if this gain is better.
    if Gain(i, a) < best_gain
      best_i = i;
      best_a = a;
      best_gain = Gain(i, a);
  end 
end

Or you could do it all at the end with the find() function:

[best_i best_a] = find(Gain == min(Gain(:));
best_gain = Gain(best_i, best_a);

If you do that, then take the if statement out of the loop.

[ISIMG]

thank you very much