线性搜索法MATLAB程序实现(共2页).docx

精选优质文档-倾情为你奉上function y,dy = fx(a)%要优化的目标函数%返回值：y，函数在a点处的值；dy，函数在a点处的导数值syms x;f = sym(0.00723*x0.1+0.03*x(-1);y = subs(f,a);dy = subs(diff(f),a);endx0 = 50; %起始点epsilon= 1e-6; %迭代精度num = 0; %迭代次数y0,dy0 = fx(x0);while abs(dy0)epsilon x00 = x0; y00 = y0; step = abs(dy0)*1e2; %步长的初始值 y1,dy1 = fx(x0-dy0*step); if(y1=y0) while y1=y0 step = step/2; y1,dy1 = f