matlab进退法求单峰区间

以下是 Matlab 进退法求单峰区间的示例代码：

function [xmin, fmin] = golden_section_search(f, a, b, tol)
% Matlab 进退法求单峰区间
alpha = 0.618;
x1 = a + (1 - alpha) * (b - a);
x2 = a + alpha * (b - a);
while abs(b - a) > tol
    if f(x1) < f(x2)
        b = x2;
        x2 = x1;
        x1 = a + (1 - alpha) * (b - a);
    else
        a = x1;
        x1 = x2;
        x2 = a + alpha * (b - a);
    end
end
xmin = (a + b) / 2;
fmin = f(xmin);
end

希望可以对您有所帮助。