Variable in cost function should take only two values.

How can i set my objective function variable to take only 0 and 1 and not anything in between? I am using ga solver and my objective function is like min(f(x))= x(1) + x(2) + x(3) with constraint that (x(1) +x(2) + x(3))*0.2=0.4. Please help

[John D'Errico]

Use intlinprog instead.

[Mondeep maz]

Thanks this would work for a single objective function. What if i had a multi objective problem?

[sloppydisk]

You must specify how the multiple objectives have to be used. Perhaps you want to minimize the sum of the objective functions? Or give each objective a weight?

[Walter Roberson]

(x(1) +x(2) + x(3))*0.2=0.4 is the same constraint as (x(1) +x(2) + x(3))*2=4 which is the same as (x(1) +x(2) + x(3)) = 2 . Using the integer valued one avoids any issues of round-off due to 0.2 not being exactly representable as an integer.

[John BG]

working in binary formay may come handy:

L=dec2bin(randi([0 100],1,1))
uint8(str2num(L(:))')

John BG

<mailto:[e-mail] [e-mail]>

[Mondeep maz]

Thank you for the help guys.