iter chisq delta/lim lambda a b 0 4.8453053176e+06 0.00e+00 7.07e-01 1.000000e+00 1.000000e+00 1 1.6709987683e+05 -2.80e+06 7.07e-02 2.525913e+00 2.161942e+02 2 1.6667175206e+05 -2.57e+02 7.07e-03 -1.715968e+02 2.199973e+02 3 1.6414949666e+05 -1.54e+03 7.07e-04 -2.699906e+03 2.595947e+02 4 1.6409518341e+05 -3.31e+01 7.07e-05 -3.128608e+03 2.663089e+02 5 1.6409518325e+05 -9.52e-05 7.07e-06 -3.129336e+03 2.663203e+02 iter chisq delta/lim lambda a b After 5 iterations the fit converged. final sum of squares of residuals : 164095 rel. change during last iteration : -9.51616e-10 degrees of freedom (FIT_NDF) : 98 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 40.9199 variance of residuals (reduced chisquare) = WSSR/ndf : 1674.44 Final set of parameters Asymptotic Standard Error ======================= ========================== a = -3129.34 +/- 2384 (76.19%) b = 266.32 +/- 37.57 (14.11%) correlation matrix of the fit parameters: a b a 1.000 b -0.994 1.000 iter chisq delta/lim lambda aa bb 0 4.8067339365e+06 0.00e+00 9.56e-01 1.000000e+00 1.000000e+00 1 1.6567425140e+05 -2.80e+06 9.56e-02 1.113320e+02 1.150902e+02 2 1.6256126289e+05 -1.91e+03 9.56e-03 3.913863e+02 -1.383578e+02 3 1.5824974701e+05 -2.72e+03 9.56e-04 1.287890e+03 -9.531211e+02 4 1.5824530732e+05 -2.81e+00 9.56e-05 1.317587e+03 -9.801098e+02 5 1.5824530732e+05 -3.08e-07 9.56e-06 1.317597e+03 -9.801188e+02 iter chisq delta/lim lambda aa bb After 5 iterations the fit converged. final sum of squares of residuals : 158245 rel. change during last iteration : -3.0782e-12 degrees of freedom (FIT_NDF) : 98 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 40.1839 variance of residuals (reduced chisquare) = WSSR/ndf : 1614.75 Final set of parameters Asymptotic Standard Error ======================= ========================== aa = 1317.6 +/- 566.5 (43%) bb = -980.119 +/- 514.9 (52.53%) correlation matrix of the fit parameters: aa bb aa 1.000 bb -1.000 1.000 iter chisq delta/lim lambda aaa bbb 0 8.1385601354e+06 0.00e+00 9.56e-01 1.000000e+00 1.000000e+00 1 5.3975388072e+04 -1.50e+07 9.56e-02 1.319509e+02 1.649079e+02 2 3.1741255515e+04 -7.00e+04 9.56e-03 -6.251153e+02 8.543613e+02 3 5.4599157975e+01 -5.80e+07 9.56e-04 -3.055503e+03 3.063152e+03 4 2.1970495409e+01 -1.49e+05 9.56e-05 -3.136008e+03 3.136318e+03 5 2.1970491829e+01 -1.63e-02 9.56e-06 -3.136035e+03 3.136342e+03 iter chisq delta/lim lambda aaa bbb After 5 iterations the fit converged. final sum of squares of residuals : 21.9705 rel. change during last iteration : -1.62953e-07 degrees of freedom (FIT_NDF) : 98 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.473486 variance of residuals (reduced chisquare) = WSSR/ndf : 0.224189 Final set of parameters Asymptotic Standard Error ======================= ========================== aaa = -3136.04 +/- 6.675 (0.2129%) bbb = 3136.34 +/- 6.067 (0.1934%) correlation matrix of the fit parameters: aaa bbb aaa 1.000 bbb -1.000 1.000