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  1. ROOT
  2. ROOT-10518

chi2FitTo and fitTo are not working properly with multiple ranges

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 6.18/00, 6.20/00
    • Fix Version/s: 6.20/00, 6.22/00
    • Component/s: RooFit/RooStats
    • Labels:
      None
    • Environment:

      scientific linux

       

       

      Description

      I have checked that the problem appears with 6.18.00 as well (while I had tried with an earlier version : 6.12.06)

      The following problem may be a consequence of the other bug report that I have given : ROOT-10517.

       

      We see on the first page left, that the green curve fit is completely crazy, with Chi2FitTo.

      With fitTo, it is bad as well, while less visible.

       

      Please find attached :

      -A minimum program, in the configuration made to show the problem.

      -A pdf that summarise the main problem in the first page.

      I have shown that to a stat forum, and experts do agree that there should be a bug in roofit. it may be a consequence of the bug of CutRange (but maybe it is a second bug of roofit).

       

        Attachments

        1. MinimumProblem.C
          28 kB
        2. QuestionStat.pdf
          256 kB
        3. rangeProblem.png
          rangeProblem.png
          14 kB

          Activity

            People

            • Assignee:
              shageboe Stephan Hageboeck
              Reporter:
              escalier Marc Escalier
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              Dates

              • Created:
                Updated:
                Resolved: