Seyedali Mirjalili

Hi Ben,

That is for calculating the inertia mass. ( Equation 16 in "GSA: A Gravitational Search Algorithm”, Information sciences, vol. 179, no. 13, pp. 2232-2248, 2009."

1. Yes, you are codes are correct, sum of the masses should be calculated before the loop.
2. Yes its a free parameter. You can utilize 1 as well.

Regards,
Ali

Hi Seyedali,

I have two questions on your code so far.

1. I was wondering whether the following code is what you want to do as the variable "mass" is changing during each iteration.

line 100 at PSOGSA.m

for i=1:n
mass(i)=mass(i)*5/sum(mass);
end

Should above be the below?

sum_mass = sum(mass);
for i=1:n
mass(i)=mass(i)*5/sum_mass;
end

2. Where the number "5" come from? Is it a free parameter from your experience? Or is there an adaptive manner to set the factor (instead of using "5")?

Thanks,
Ben