精选优质文档-倾情为你奉上%用共轭梯度法求函数f=1.5*x12+0.5*x22-x1*x2-2*x1的极小点syms x1 x2 x01 x02 adisp(请输入初始点值x0,它是一个二维向量);x0=input(x0);disp(请输入收敛精度);e=input(e); ee=1;k=0;f=1.5*x12+0.5*x22-x1*x2-2*x1;fx1=diff(f,x1);fx2=diff(f,x2);f2x1=diff(diff(f,x1),x1);f2x2=diff(diff(f,x2),x2);fx1x2=diff(diff(f,x1),x2);fx2x1=diff(diff(f,x2),x1);g=fx1;fx2;H=f2x1 fx1x2;fx2x1 f2x2;g0=subs(g,x1,x2,x0(1),x0(2);d0=-g0;sign=0;while(double(ee)e) xx=x0+a*d0;k=k+1 y=subs(f
