Ticket #1009 (closed: fixed)

Opened 11 years ago

Last modified 5 years ago

Problem with errors in SplineBackground

Reported by: Nick Draper Owned by: Roman Tolchenov
Priority: blocker Milestone: Iteration 21
Component: Keywords:
Cc: Blocked By:
Blocking: Tester:

Description

From Laurent:

The error bars on a splineBackground are Ok unless the pline is ran on a data set with small numbers (for example 1e-3). In such cases, the errors are overestimated by several decades.

Change History

comment:1 Changed 11 years ago by Roman Tolchenov

(In [3416]) Errors should be more reasonable now. re #1009

comment:2 Changed 11 years ago by Roman Tolchenov

  • Status changed from new to accepted

Use unweighted fit if all errors in the input workspace are zero.

comment:3 Changed 11 years ago by Roman Tolchenov

  • Status changed from accepted to testing
  • Resolution set to fixed

comment:4 Changed 11 years ago by Nick Draper

  • Status changed from testing to closed

Tested by multiply dividing a focussed GEM dataset by 1000 and running a spline again, The errors stayed in scale down to 1e-7. It was not tested further.

revision 3805

comment:5 Changed 5 years ago by Stuart Campbell

This ticket has been transferred to github issue ​1857

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