******************************************************************************* Mon Apr 3 11:34:53 2023 FIT: data read from 'DistStartInjLine_phase_space.dat' u 9:12 format = x:z #datapoints = 2000 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 1.1795597089e+02 0.00e+00 7.07e-01 1.000000e+00 1.000000e+00 4 1.5098192381e-02 -2.18e-04 7.07e-05 7.570728e-01 5.665164e-01 After 4 iterations the fit converged. final sum of squares of residuals : 0.0150982 rel. change during last iteration : -2.18113e-09 degrees of freedom (FIT_NDF) : 1998 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.00274894 variance of residuals (reduced chisquare) = WSSR/ndf : 7.55665e-06 Final set of parameters Asymptotic Standard Error ======================= ========================== a = 0.757073 +/- 6.152e-05 (0.008126%) b = 0.566516 +/- 0.01102 (1.945%) correlation matrix of the fit parameters: a b a 1.000 b 0.042 1.000