ackley function的matlab代码
时间: 2024-02-12 13:41:09 浏览: 24
下面是Ackley函数的Matlab代码:
```matlab
function y = ackley(x)
n = length(x);
sum1 = sum(x.^2);
sum2 = sum(cos(2*pi*x));
term1 = -20 * exp(-0.2 * sqrt(sum1 / n));
term2 = -exp(sum2 / n);
y = term1 + term2 + 20 + exp(1);
end
```
该代码定义了一个名为`ackley`的函数,它接受一个输入向量`x`,并返回对应的Ackley函数值。请注意,Ackley函数是一个多峰函数,具有全局最小值和许多局部最小值。
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Ackley function的matlab代码
function [y] = ackley(x)
%ACKLEY Ackley function
% - x: input vector
% - y: output scalar
n = length(x);
sum1 = sum(x.^2);
sum2 = sum(cos(2*pi*x));
y = -20*exp(-0.2*sqrt(sum1/n)) - exp(sum2/n) + 20 + exp(1);
end
Shifted Ackley function的matlab代码
以下是Shifted Ackley函数的Matlab代码:
function [y] = ShiftedAckley(x,shift)
% Shifted Ackley Function
% x: matrix of input vectors
% shift: shift vector
% y: column vector of function values
dim = size(x,2);
a = 20;
b = 0.2;
c = 2*pi;
% shift the input vectors
x = x - repmat(shift,size(x,1),1);
% calculate the function values
term1 = -a * exp(-b * sqrt(sum(x.^2,2)/dim));
term2 = -exp(sum(cos(c*x),2)/dim);
y = term1 + term2 + a + exp(1);
end