******************************************************************************* Mon Apr 3 09:44:04 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 2.0003203324e+03 0.00e+00 7.07e-01 1.000000e+00 1.000000e+00 4 3.7829131960e-02 -4.58e-04 7.07e-05 -2.274736e-05 3.872571e-02 After 4 iterations the fit converged. final sum of squares of residuals : 0.0378291 rel. change during last iteration : -4.58235e-09 degrees of freedom (FIT_NDF) : 1998 rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.00435126 variance of residuals (reduced chisquare) = WSSR/ndf : 1.89335e-05 Final set of parameters Asymptotic Standard Error ======================= ========================== a = -2.27474e-05 +/- 9.73e-05 (427.7%) b = 0.0387257 +/- 0.01763 (45.54%) correlation matrix of the fit parameters: a b a 1.000 b -0.006 1.000