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ÎÒÊǸöMATLABÐÂÊÖ£¬ÔÚÓ¦ÓÃ±à¼Æ÷±à¼º¯Êý£º function F = myfun(x) a_m=534.87,b_m=-301.56,a_n=534.86,b_n=-301.58,c_m=-0.15,d_m=-0.27,c_n=-0.15,d_n=-0.27,l=300; A=0.5*(exp(x(1)*l)+exp(-x(1)*l))*cos(x(2)*l); B=0.5*(exp(x(1)*l)-exp(-x(1)*l))*sin(x(2)*l); C=0.5*(exp(x(1)*l)-exp(-x(1)*l))*cos(x(2)*l); D=0.5*(exp(x(1)*l)+exp(-x(1)*l))*sin(x(2)*l); E=0.5*(exp(0.5*x(1)*l)+exp(-0.5*x(1)*l))*cos(0.5*x(2)*l); I=0.5*(exp(0.5*x(1)*l)-exp(-0.5*x(1)*l))*sin(0.5*x(2)*l); G=0.5*(exp(0.5*x(1)*l)-exp(-0.5*x(1)*l))*cos(0.5*x(2)*l); H=0.5*(exp(0.5*x(1)*l)+exp(-0.5*x(1)*l))*sin(0.5*x(2)*l); J=a_m*A-b_m*B-x(3)*c_m*C+x(4)*d_m*C+x(4)*c_m*D+x(3)*d_m*D; K=a_n*A-b_n*B-x(3)*c_n*C+x(4)*d_n*C+x(4)*c_n*D+x(3)*d_n*D; L=A*b_m+B*a_m-x(4)*c_m*C-x(3)*d_m*C-x(3)*c_m*D+x(4)*d_m*D; M=A*b_n+B*a_n-x(4)*c_n*C-x(3)*d_n*C-x(3)*c_n*D+x(4)*d_n*D; N=a_m*E-b_m*I-x(3)*c_m*G+x(4)*d_m*G+x(4)*c_m*H+x(3)*d_m*H; O=E*b_m+I*a_m-x(4)*c_m*G-x(3)*d_m*G-x(3)*c_m*H+x(4)*d_m*H; P=a_n*E-b_n*I-x(3)*c_n*G+x(4)*d_n*G+x(4)*c_n*H+x(3)*d_n*H; Q=E*b_n+I*a_n-x(4)*c_n*G-x(3)*d_n*G-x(3)*c_n*H+x(4)*d_n*H; F=[J*K-L*M-a_n*a_m+b_m*b_n; J*M+K*L-a_m*b_n-a_n*b_m; P*J-Q*L-N*a_n+O*b_n; P*L+Q*J-N*b_n-O*a_n] È»ºóÔÚÃüÁî´°ÊäÈ룺 x0=[1 2 3 4]; [x]=lsqnonlin(@myfun,x0) ½á¹û³öÏÖÕâÖÖÇé¿ö£º ??? Error using ==> eig NaN or Inf prevents convergence. Error in ==> C:\MATLAB6p5p1\toolbox\optim\private\trust.m On line 28 ==> [V,D] = eig(H); Error in ==> C:\MATLAB6p5p1\toolbox\optim\private\trdog.m On line 108 ==> [st,qpval,po,fcnt,lambda] = trust(rhs,MM,delta); Error in ==> C:\MATLAB6p5p1\toolbox\optim\private\snls.m On line 375 ==> [sx,snod,qp,posdef,pcgit,Z] = trdog(x,g,A,D,delta,dv,... Error in ==> C:\MATLAB6p5p1\toolbox\optim\private\lsqncommon.m On line 207 ==> [x,FVAL,LAMBDA,JACOB,EXITFLAG,OUTPUT,msg]=... Error in ==> C:\MATLAB6p5p1\toolbox\optim\lsqnonlin.m On line 122 ==> [x,Resnorm,FVAL,EXITFLAG,OUTPUT,LAMBDA,JACOB] = ... ÇëÎʸ÷λ´óϺ£¬Ó¦¸ÃÔõô½â¾ö¡£ ÒÔǰÓö¼¿ÉÒÔ£¬Ö»ÊÇ·½³Ì±äÁË [ Last edited by ajicsu on 2010-5-19 at 12:12 ] |
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![]() ÕâÊÇɶÊý? F = 1.0e+265 * 1.568034000166487 -3.175955144234988 0.000000000000000 0.000000000000000 |
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