基于MATLAB的变色龙优化算法的代码
时间: 2024-05-16 16:15:41 浏览: 12
以下是基于MATLAB的变色龙优化算法的实现代码:
```matlab
function [best, best_fit] = chameleon_optimization(problem, n_pop, max_iter)
% problem: 问题函数句柄
% n_pop: 种群数量
% max_iter: 最大迭代次数
% 初始化种群
pop = init_population(n_pop, problem.n_var, problem.var_min, problem.var_max);
% 计算初始适应度
fit = zeros(n_pop, 1);
for i = 1:n_pop
fit(i) = problem.fitness(pop(i, :));
end
% 保存所有迭代的最优解
best = zeros(max_iter, problem.n_var);
best_fit = zeros(max_iter, 1);
% 进行迭代
for iter = 1:max_iter
% 计算种群中每个个体的最佳位置
p_best = pop;
f_p_best = fit;
for i = 1:n_pop
for j = 1:problem.n_var
temp = pop(i, j);
pop(i, j) = problem.var_min(j) + (problem.var_max(j) - problem.var_min(j)) * rand();
f = problem.fitness(pop(i, :));
if f < f_p_best(i)
f_p_best(i) = f;
p_best(i, :) = pop(i, :);
else
pop(i, j) = temp;
end
end
end
% 找到种群中的最优个体
[g_best_fit, g_best_idx] = min(f_p_best);
g_best = p_best(g_best_idx, :);
% 保存最优解和适应度
best(iter, :) = g_best;
best_fit(iter) = g_best_fit;
% 更新种群
for i = 1:n_pop
for j = 1:problem.n_var
if rand() < 0.5
pop(i, j) = pop(i, j) + rand() * (g_best(j) - pop(i, j));
else
pop(i, j) = pop(i, j) + rand() * (p_best(i, j) - pop(i, j));
end
pop(i, j) = max(pop(i, j), problem.var_min(j));
pop(i, j) = min(pop(i, j), problem.var_max(j));
end
end
% 计算适应度
for i = 1:n_pop
fit(i) = problem.fitness(pop(i, :));
end
end
end
function pop = init_population(n_pop, n_var, var_min, var_max)
% 初始化种群
pop = zeros(n_pop, n_var);
for i = 1:n_pop
pop(i, :) = var_min + (var_max - var_min) * rand(1, n_var);
end
end
```
其中,`problem` 是问题函数句柄,即实现了 `fitness` 函数的函数句柄,`n_pop` 是种群数量,`max_iter` 是最大迭代次数。函数返回最优解和适应度的历史记录。
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