一些其他函数

重量计算函数：

function wgtsum = weightsum(pop, weights)
% 计算种群的重量
% pop           input  种群
% weights       input  重量向量
% wgtsum        output 种群重量
popsize = size(pop, 1);
wgtsum = zeros(popsize, 1);
for i = 1:popsize
    wgtsum(i, 1) = weightsumv(pop(i, :), weights);
end
end

function wgtsum = weightsumv(stuffs, weights)
% 计算一个个体的重量
% stuffs        input  物品序列
% weights       input  重量向量
% wgtsum        output 个体重量
wgtsum = sum(weights(stuffs ~= 0));
end

收益计算函数：

function pftsum = profitssum(pop, profits)
% 计算种群收益
% pop       input  种群
% profits   input  收益向量
% pftsum    output 种群收益
popsize = size(pop, 1);
pftsum = zeros(popsize, 1);
for i = 1:popsize
    pftsum(i, 1) = sum(profits(pop(i, :) ~= 0));
end
end