matlab梯度法求无约束的优化问题（min）.rar

% wysyh.m % 求解无约束优化问题 clc x=[2;2]; [f0,g]=detaf(x); while norm(g)>0.000001 p=-g/norm(g); t=1.0;f=detaf(x+t*p); while f>f0 t=t/2; f=detaf(x+t*p); end x=x+t*p; [f0,g]=detaf(x); end x,f0