matlab实验求解

Question

如图实验求解 迭代法的复杂性实验 给出代码就好 越快越好 给出答案合适就给悬赏

Answer 1

该回答引用ChatGPT GPT-4

运行结果

代码如下

% 参数设置
lambda_min = 2.8;
lambda_max = 4;
lambda_step = 0.01;
x0_min = 0.01;
x0_max = 0.99;
num_iter = 1000;
num_skip = 50;

% 初始化
lambdas = lambda_min:lambda_step:lambda_max;
num_lambda = length(lambdas);
x0s = linspace(x0_min, x0_max, 10);
xk = zeros(num_iter, num_lambda);

% 迭代计算
for idx = 1:num_lambda
    lambda = lambdas(idx);
    x = x0s;
    for k = 1:num_iter
        x = lambda * x .* (1 - x);
        if k > num_skip
            xk(k, idx) = x(1);
        end
    end
end

% 画图
figure;
hold on;
for idx = 1:num_lambda
    plot(lambdas(idx) * ones(num_iter - num_skip, 1), xk(num_skip+1:end, idx), '.', 'MarkerSize', 1);
end
xlabel('λ');
ylabel('x_k');
title('不同λ情况下x_k (k>50)的图形');