******************************************************************************* Fri May 18 14:12:46 2012 FIT: data read from './absorption.txt' u 1:(log($2)):($3/$2) format = x:z:s #datapoints = 128 function used for fitting: f(x) fitted parameters initialized with current variable values Iteration 0 WSSR : 1.5913e+07 delta(WSSR)/WSSR : 0 delta(WSSR) : 0 limit for stopping : 1e-05 lambda : 26.1298 initial set of free parameter values a0 = 1 a1 = 1 a2 = 1 a3 = 1 After 6 iterations the fit converged. final sum of squares of residuals : 738.579 rel. change during last iteration : -3.73995e-06 degrees of freedom (FIT_NDF) : 124 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 2.44055 variance of residuals (reduced chisquare) = WSSR/ndf : 5.95628 Final set of parameters Asymptotic Standard Error ======================= ========================== a0 = -3.92198 +/- 0.01537 (0.392%) a1 = -36.7468 +/- 1.074 (2.922%) a2 = 137.704 +/- 19.92 (14.47%) a3 = -301.657 +/- 103.8 (34.43%) correlation matrix of the fit parameters: a0 a1 a2 a3 a0 1.000 a1 -0.853 1.000 a2 0.726 -0.967 1.000 a3 -0.640 0.913 -0.986 1.000 ******************************************************************************* Fri May 18 14:16:19 2012 FIT: data read from './absorption.txt' u 1:(log($2)):($3/$2) format = x:z:s BREAK: No data to fit ******************************************************************************* Fri May 18 15:05:00 2012 FIT: data read from './absorption.txt' u 1:(log($2)):($3/$2) format = x:z:s #datapoints = 61 function used for fitting: f(x) fitted parameters initialized with current variable values Iteration 0 WSSR : 6939.53 delta(WSSR)/WSSR : 0 delta(WSSR) : 0 limit for stopping : 1e-05 lambda : 26.6754 initial set of free parameter values a0 = -3.92198 a1 = -36.7468 a2 = 137.704 a3 = -301.657 After 7 iterations the fit converged. final sum of squares of residuals : 73.7968 rel. change during last iteration : -9.77808e-07 degrees of freedom (FIT_NDF) : 57 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.13784 variance of residuals (reduced chisquare) = WSSR/ndf : 1.29468 Final set of parameters Asymptotic Standard Error ======================= ========================== a0 = -3.99402 +/- 0.01004 (0.2515%) a1 = -27.5532 +/- 1.488 (5.4%) a2 = 115.838 +/- 58.13 (50.19%) a3 = -619.744 +/- 637.4 (102.9%) correlation matrix of the fit parameters: a0 a1 a2 a3 a0 1.000 a1 -0.850 1.000 a2 0.724 -0.967 1.000 a3 -0.639 0.914 -0.986 1.000 ******************************************************************************* Fri May 18 15:07:36 2012 FIT: data read from './absorption.txt' u 1:2:3 format = x:z:s #datapoints = 61 function used for fitting: f(x) fitted parameters initialized with current variable values Iteration 0 WSSR : 7.1303e+10 delta(WSSR)/WSSR : 0 delta(WSSR) : 0 limit for stopping : 1e-05 lambda : 3421.73 initial set of free parameter values a0 = -3.99402 a1 = -27.5532 a2 = 115.838 a3 = -619.744 After 8 iterations the fit converged. final sum of squares of residuals : 77.239 rel. change during last iteration : -7.98607e-09 degrees of freedom (FIT_NDF) : 57 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 1.16408 variance of residuals (reduced chisquare) = WSSR/ndf : 1.35507 Final set of parameters Asymptotic Standard Error ======================= ========================== a0 = 0.0182612 +/- 0.0001569 (0.8592%) a1 = -0.463437 +/- 0.01803 (3.89%) a2 = 5.86477 +/- 0.6007 (10.24%) a3 = -31.9788 +/- 5.9 (18.45%) correlation matrix of the fit parameters: a0 a1 a2 a3 a0 1.000 a1 -0.892 1.000 a2 0.781 -0.974 1.000 a3 -0.702 0.930 -0.988 1.000