******************************************************************************* Thu Jun 22 18:39:14 2023 FIT: data read from 'phase_space_at_22340_ns.dat' u 9:15 format = x:z #datapoints = 867 residuals are weighted equally (unit weight) function used for fitting: f(x) f(x) = a+b*x fitted parameters initialized with current variable values iter chisq delta/lim lambda a b 0 1.0199528683e+06 0.00e+00 7.07e-01 1.000000e+00 1.000000e+00 4 4.6000085393e+01 -8.30e-01 7.07e-05 3.528616e+01 1.269450e+01 After 4 iterations the fit converged. final sum of squares of residuals : 46.0001 rel. change during last iteration : -8.30448e-06 degrees of freedom (FIT_NDF) : 865 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.230606 variance of residuals (reduced chisquare) = WSSR/ndf : 0.0531793 Final set of parameters Asymptotic Standard Error ======================= ========================== a = 35.2862 +/- 0.01241 (0.03518%) b = 12.6945 +/- 9.393 (73.99%) correlation matrix of the fit parameters: a b a 1.000 b -0.776 1.000