Public Member Functions
def	__init__ (self, name, nameA, nameB, title="")

def	__str__ (self)

def	create (self, tdirectory)

Private Attributes
	_name

	_nameA

	_nameB

	_title

Detailed Description

Class for subtracting two histograms

Definition at line 760 of file plotting.py.

Constructor & Destructor Documentation

◆ init()

def plotting.Subtract.__init__	(	self,
		name,
		nameA,
		nameB,
		title = `""`
	)

Constructor

Arguments:
name  -- String for name of the resulting histogram (A-B)
nameA -- String for A histogram
nameB -- String for B histogram

Keyword arguments:
title -- String for a title of the resulting histogram (default "")

Uncertainties are calculated with the assumption that B is a
subset of A, and the histograms contain event counts.

Definition at line 762 of file plotting.py.

     def __init__(self, name, nameA, nameB, title=""):
         """Constructor
  
         Arguments:
         name  -- String for name of the resulting histogram (A-B)
         nameA -- String for A histogram
         nameB -- String for B histogram
  
         Keyword arguments:
         title -- String for a title of the resulting histogram (default "")
  
         Uncertainties are calculated with the assumption that B is a
         subset of A, and the histograms contain event counts.
         """
         self._name = name
         self._nameA = nameA
         self._nameB = nameB
         self._title = title
  

Member Function Documentation

◆ str()

def plotting.Subtract.__str__ ( self )

String representation, returns the name

Definition at line 781 of file plotting.py.

     def __str__(self):
         """String representation, returns the name"""
         return self._name
  

References FP420HitsObject._name, TrackerHitsObject._name, PGeometricDet::Item._name, TrackingRecHitAlgorithm._name, Logger._name, hcaldqm::DQModule._name, citk::IsolationConeDefinitionBase._name, WValidation._name, DrellYanValidation._name, hcaldqm::flag::Flag._name, hcaldqm::quantity::Quantity._name, GeometricDetExtra._name, GeometricTimingDetExtra._name, HistoParams< T >._name, CutApplicatorBase._name, HistoParams< TH2F >._name, HistoParams< TProfile2D >._name, SequenceTypes.SequencePlaceholder._name, plotting.Subtract._name, and SequenceTypes.TaskPlaceholder._name.

◆ create()

def plotting.Subtract.create	(	self,
		tdirectory
	)

Create and return the fake+duplicate histogram from a TDirectory

Definition at line 785 of file plotting.py.

     def create(self, tdirectory):
         """Create and return the fake+duplicate histogram from a TDirectory"""
         histoA = _getObject(tdirectory, self._nameA)
         histoB = _getObject(tdirectory, self._nameB)
  
         if not histoA or not histoB:
             return None
  
         ret = histoA.Clone(self._name)
         ret.SetTitle(self._title)
  
         # Disable canExtend if it is set, otherwise setting the
         # overflow bin will extend instead, possibly causing weird
         # effects downstream
         ret.SetCanExtend(False)
  
         for i in range(0, histoA.GetNbinsX()+2): # include under- and overflow too
             val = histoA.GetBinContent(i)-histoB.GetBinContent(i)
             ret.SetBinContent(i, val)
             ret.SetBinError(i, math.sqrt(val))
  
         return ret
  