void NR::mrqcof(Vec_I_DP &x, Vec_I_DP &y, Vec_I_DP &sig, Vec_I_DP &a, Vec_I_BOOL &ia, Mat_O_DP &alpha, Vec_O_DP &beta, DP &chisq, void funcs(const DP, Vec_I_DP &,DP &, Vec_O_DP &)) { int i,j,k,l,m,mfit=0; DP ymod,wt,sig2i,dy; int ndata=x.size(); int ma=a.size(); Vec_DP dyda(ma); for (j=0;j<ma;j++) if (ia[j]) mfit++; for (j=0;j<mfit;j++) { for (k=0;k<=j;k++) alpha[j][k]=0.0; beta[j]=0.0; } chisq=0.0; for (i=0;i<ndata;i++) { funcs(x[i],a,ymod,dyda); sig2i=1.0/(sig[i]*sig[i]); dy=y[i]-ymod; for (j=0,l=0;l<ma;l++) { if (ia[l]) { wt=dyda[l]*sig2i; for (k=0,m=0;m<l+1;m++) if (ia[m]) alpha[j][k++] += wt*dyda[m]; beta[j++] += dy*wt; } } chisq += dy*dy*sig2i; } for (j=1;j<mfit;j++) for (k=0;k<j;k++) alpha[k][j]=alpha[j][k]; }
//----------------------------------------------------------------------- void TLMFit::mrqcof(vector<double> &ba, vector< vector<double> > &balpha, vector < double> &bbeta) { vector < double> dyda(nparam, 0); int i, j, k, l, m, mfit = 0; double ymod, wt, dy; for (j = 0; j < nparam; j++) if (ia[j] > 0) mfit++; for (j = 0; j < mfit; j++) { for (k = 0; k <=j; k++) balpha[j][k] = 0.0; bbeta[j] = 0.0; } chisq = 0.0; for (i = 0; i < ndata; i++) { (*funcP)(x[i], ba, ymod, dyda, nparam); dy = y[i] - ymod; for (j=-1, l = 0; l < nparam; l++) { if (ia[l]) { wt = dyda[l]; for (j++, k=-1, m = 0; m <= l; m++) { if (ia[m]) balpha[j][++k] += wt*dyda[m]; } bbeta[j] += dy*wt; } } chisq += dy*dy; } for (j = 1; j < mfit; j++) for (k = 0; k < j; k++) balpha[k][j] = balpha[j][k]; }