Question

我试图在Ackley Function中绘制matlab，但我收到以下错误

使用冲浪时出错（第xxx行）

X，Y，Z和C不能复杂。

这是我使用

的代码

clear; clc; close all;
% Parameters
nx = 2;                 % No. of Input variables
f = @ackley;
limits = repmat([-40 40], nx, 1);
titl = 'Ackley';

% Plot
[X,Y] = meshgrid(linspace(limits(1,1),limits(1,2),100),...
                     linspace(limits(2,1),limits(2,2),100));
Z = reshape(f([X(:)'; Y(:)']), 100, 100);

surfc(X,Y,Z);

Ackley.m

function [y] = ackley(x)
    d = length(x);
    a = 20;
    b = 0.2;
    c = 2*pi;

    term1 = -a * exp(-b*sqrt(1/d * sum(x)));
    term2 = -exp(1/d * sum(cos(c * x)));

    y = term1 + term2 + a + exp(1);
end

Answer 1

您在term1 = -a * exp(-b*sqrt(1/d * sum(x)));中获得了sqrt（）计算的否定参数。调整您的绘图范围。例如limits = repmat([0 40], nx, 1);

Answer 2

正如 hbaderts 所提到的，当您按如下方式更改Ackley函数时，您的代码可以正常工作：

function [y] = ackley(x)
    d = length(x);
    a = 20;
    b = 0.2;
    c = 2*pi;

    term1 = -a * exp(-b*sqrt(1/d * sum(x.^2)));
    term2 = -exp(1/d * sum(cos(c * x)));

    y = term1 + term2 + a + exp(1);
end

＆＃39;冲浪＆＃39;错误X，Y，Z和C不能复杂（matlab）

2 个答案: