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Stephan Hageboeck authored
- Add a tutorial for the Barlow-Beeston method, rf709_BarlowBeeston.C.
- Remove legacy iterators from RooHistConstraint and RooParamHistFunc,
which are used to implement the Barlow-Beeston method.
- Replace iterative logGamma in RooHistConstraint by std::lgamma
- Make sure that bins with zero entries don't get touched by MINUIT.
This reduces the number of degenerate parameters without any effect, and
stabilises the covariance matrix.
- Update documentation of the respective classes.
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