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´úÂëÎÒÊÇÒÀÕÕÒ»±¾½Ì³Ì×öµÄ£¬¿ÉÔËÐÐʱ¾Í³öÏÖÈçÏ´íÎó£º syms x1 x2 >> x0=[1,2]'; >> [x,val,k]=sr1(fun,gfun,x0) ??? Undefined function or variable 'fun'. Õâ¸öÊÇ´úÂ룺 function [x,val,k] =sr1(fun,gfun,x0) %¹¦ÄÜ£ºÓöԳÆÖÈ1Ëã·¨Çó½âÎÞÔ¼ÊøÎÊÌ⣺min f(x) %ÊäÈ룺X0Êdzõʼµã£¬fun,gfun·Ö±ðÊÇÄ¿±êº¯Êý¼°ÆäÌÝ¶È %Êä³ö£ºx£¬val·Ö±ðÊǽüËÆ×îÓŵãºÍ×îÓÅÖµ£¬kÊǵü´ú´ÎÊý. maxk=500; %¸ø³ö×î´óµü´ú´ÎÊý rho=0.55;sigma=0.4;epsilon=le-4; k=0; n=length(x0);Hk=eye(n); while(k<maxk) gk=feval(gfun,x0);%¼ÆËãÌÝ¶È dk=-Hk*gk;%¼ÆËãËÑË÷·½Ïò if(norm(gk)<epsilon),break;end %¼ìÑéÖÕÖ¹×¼Ôò m=0;mk=0; while(m<20) %ÓÃArmijoËÑË÷Çó²½³¤ if(feval(fun,x0+rho^m*dk)<feval(fun,x0)+sigma*rho^m*gk'*dk) mk=m;break; end m=m+1; end x=x0+rho^mk*dk; sk=x-x0; yk=feval(gfun,x)-gk; Hk=Hk+(sk-Hk*yk)*(sk-Hk*yk)'/((sk-Hk*yk)'*yk); %ÖÈ1УÕý k=k+1; x0=x; end val=feval(fun,x0); |
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heaven0419
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3Â¥2015-11-20 22:31:20
yanshuiting
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2Â¥2015-11-20 22:28:12
champion3568
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4Â¥2015-11-20 23:45:39













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