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  1. ROOT
  2. ROOT-8440

Non extended likelihood fit in two separated ranges with RooFit

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Details

    • Bug
    • Resolution: Fixed
    • Medium
    • master, 6.26/00
    • None
    • RooFit/RooStats
    • None
    • All

    Description

      As reported in https://root.cern.ch/phpBB3/viewtopic.php?f=15&t=22635, a non-extended likelihood fit returns a wrong result when fitting multiple ranges.
      The extended maximum likelihood fit with RooFit returns a correct result.
      A simple test program is attached where a polynomial fit of two sidebands is performed.
      As comparison an extended and non extended likelihood fit using directly ROOT is performed.
      (running the ROOT fit requires using the master for a bug fix in the extended maximum likelihood fits).

      Lorenzo

      Attachments

        1. fit2range.pdf
          21 kB
        2. rootForum_22635.C
          7 kB
        3. rootForum_22635.C
          3 kB
        4. rootForum_22635-1.C
          8 kB

        Activity

          People

            moneta Lorenzo Moneta
            moneta Lorenzo Moneta
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            Dates

              Created:
              Updated:
              Resolved: