新手接触Matlab，求大佬指教！！提示函数使用错误。代码如下：function [x,val,k]=sr1(fun,gfun,x0) maxk=500; rho=0.55;sigma=0.4;epsilon=1e-5; k=0; n=length(x0);Hk=eye(n); while(k<maxk) gk=feval(gfun,x0); dk=-Hk*gk; if(norm(gk)<epsilon),break; end m=0;mk=0; while(m<20) 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); k=k+1;x0=x; end val=feval(fun,x0);