dependence of fit with previous one

Hello,

i observed a dependence of a given fit the previous one, *even* when i reinitialize each of the parameters and their errors

-->is there a way to "reinitialize" the fitter to have reproducibility
one one do some previous (or not) fits ?

thanks a lot

-->here is a log of the fits

http://users.lal.in2p3.fr/escalier/ProblemRoot/

it begins to change here :
with only one fit :
 2 CB_mean 1.40000e+02 6.00000e-01 2.01358e-01 2.51098e+02

with *a* previous fit before (and after having reiniatzed the parameter by SetParameter and SetParError) :
2 CB_mean 1.40000e+02 6.00000e-01 2.01358e-01 2.51095e+02

at the end of the fit : it gives
with only one fit :

1  A            6.19000e+02     fixed    
   2  CB_mean      1.39795e+02   3.64629e-02                            
   3  CB_sigma     1.95380e+00   3.00964e-02                            
   4  CB_alpha     1.22909e+00   4.12433e-02                            
   5  CB_n         1.00000e+01     fixed    
   6  Gauss_mean   1.44687e+02   7.63561e-01                            
   7  Gauss_sigma   2.57589e+00   4.29212e-01                            
   8  frac_CB      9.75035e-01   5.66139e-03    

with *a* previous fit before (and after having reiniatzed the parameter by SetParameter and SetParError) :

   1  A            6.19000e+02     fixed    
   2  CB_mean      1.39795e+02   3.72340e-02                            
   3  CB_sigma     1.95381e+00   3.07984e-02                            
   4  CB_alpha     1.22910e+00   4.12501e-02                            
   5  CB_n         1.00000e+01     fixed    
   6  Gauss_mean   1.44688e+02   7.55733e-01                            
   7  Gauss_sigma   2.57555e+00   4.30838e-01                            
   8  frac_CB      9.75039e-01   5.48416e-03    

-->some digits are not exactly the same

thanks Received on Tue Mar 01 2011 - 13:10:33 CET