Changeset fba204bf in sasview


Ignore:
Timestamp:
Sep 4, 2018 11:34:41 AM (13 months ago)
Author:
wojciech
Branches:
ESS_GUI, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc
Children:
6701a0b
Parents:
d686ff1
Message:

Added error handling for missing errors

File:
1 edited

Legend:

Unmodified
Added
Removed
  • src/sas/sascalc/pr/invertor.py

    rb8080e1 rfba204bf  
    144144        x, y, err, d_max, q_min, q_max and alpha 
    145145        """ 
    146         if   name == 'x': 
     146        if name == 'x': 
    147147            if 0.0 in value: 
    148148                msg = "Invertor: one of your q-values is zero. " 
     
    227227        return None 
    228228 
     229    def add_errors(self, yvalues): 
     230        """ 
     231        Adds errors to data set is they are not avaialble 
     232        :return: 
     233        """ 
     234        stats_errors = np.zeros(len(yvalues)) 
     235        for i in range(len(yvalues)): 
     236            # Scale the error so that we can fit over several decades of Q 
     237            scale = 0.05 * np.sqrt(yvalues[i]) 
     238            min_err = 0.01 * yvalues[i] 
     239            stats_errors[i] = scale * np.sqrt(np.fabs(yvalues[i])) + min_err 
     240        return stats_errors 
     241 
    229242    def clone(self): 
    230243        """ 
     
    245258        invertor.y = self.y 
    246259        invertor.err = self.err 
     260        if np.size(self.err) == 0 or np.all(self.err) == 0: 
     261            invertor.err = self.add_errors(self.y) 
     262        else: 
     263            invertor.err = self.err 
    247264        invertor.est_bck = self.est_bck 
    248265        invertor.background = self.background 
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