www.gusucode.com > Weighted Differential Evolution Algorithm (WDE) > Weighted Differential Evolution Algorithm (WDE)/cc_wde/classic_benchmark_problems/rastrigin.m
function ObjVal = rastrigin(Chrom,switch1); % Dimension of objective function Dim=size(Chrom,2); % Compute population parameters [Nind,Nvar] = size(Chrom); % function 6, Dim*A + sum of (xi^2 - A*cos(Omega*xi)) for i = 1:Dim (Dim=20) % n = Dim, -5.12 <= xi <= 5.12 % global minimum at (xi)=(0) ; fmin=0 A = 10; Omega = 2 * pi; ObjVal = Dim * A + sum(((Chrom .* Chrom) - A * cos(Omega * Chrom))')'; % ObjVal = diag(Chrom * Chrom'); % both lines produce the same % otherwise error, wrong format of Chrom return