if i have fitness function how to generate the genetic algorithm ?

how to make this code

[n,m]=size(A);
A1=randi([0 1],n,m);

 S=(sum(sum(A ~= A1)))

to be a fitness function and then make the genetic algorithm to give the min value of this function

[John D'Errico]

read the help for the genetic algorithm. First, you may need the proper toolbox. Or you need to write the code for a genetic algorithm. Or find one on the file exchange.