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Reference Guide
TH1Merger Class Reference

Definition at line 17 of file TH1Merger.h.

Public Types

enum  EMergerType {
  kNotCompatible = -1, kAllSameAxes = 0, kAllNoLimits = 1, kHasNewLimits = 2,
  kAllLabel = 3, kAutoP2HaveLimits = 4, kAutoP2NeedLimits = 5
}
 

Public Member Functions

 TH1Merger (TH1 &h, TCollection &l, Option_t *opt="")
 
 ~TH1Merger ()
 
Bool_t operator() ()
 Function performing the actual merge. More...
 

Static Public Member Functions

static Bool_t AxesHaveLimits (const TH1 *h)
 
static Int_t CheckForDuplicateLabels (const TH1 *hist)
 Check if histogram has duplicate labels Return an integer with bit set correponding on the axis that has duplicate labels e.g. More...
 
static Int_t FindBinNumber (Int_t ibin, const TAxis &inAxis, TAxis &outAxis)
 
static Int_t FindFixBinNumber (Int_t ibin, const TAxis &inAxis, const TAxis &outAxis)
 
static Bool_t HasDuplicateLabels (const THashList *labels)
 Find a duplicate labels in an axis label list. More...
 

Private Member Functions

Bool_t AutoP2BufferMerge ()
 
Bool_t AutoP2BuildAxes (TH1 *)
 Determine final boundaries and number of bins for histograms created in power-of-2 autobin mode. More...
 
Bool_t AutoP2Merge ()
 
Bool_t BufferMerge ()
 
void CopyBuffer (TH1 *hsrc, TH1 *hdes)
 
void DefineNewAxes ()
 Function to define new histogram axis when merging It is call only in case of merging with different axis or with the buffer (kHasNewLimits) More...
 
Bool_t DifferentAxesMerge ()
 Merged histogram when axis can be different. More...
 
EMergerType ExamineHistograms ()
 Examine the list of histograms to find out which type of Merge we need to do Pass the input list containing the histogram to merge and h0 which is the initial histogram on which all the histogram of the list will be merged This are the possible cases: More...
 
Bool_t LabelMerge ()
 Merge histograms with labels. More...
 
Bool_t SameAxesMerge ()
 

Private Attributes

TH1fH0
 
TH1fHClone
 histogram on which the list is merged More...
 
TList fInputList
 copy of fH0 - managed by this class More...
 
UInt_t fNewAxisFlag
 
TAxis fNewXAxis
 
TAxis fNewYAxis
 
TAxis fNewZAxis
 
Bool_t fNoCheck = kFALSE
 
Bool_t fNoLabelMerge = kFALSE
 

#include </home/sftnight/build/workspace/root-makedoc-master/rootspi/rdoc/src/master/hist/hist/src/TH1Merger.h>

Member Enumeration Documentation

◆ EMergerType

Enumerator
kNotCompatible 
kAllSameAxes 
kAllNoLimits 
kHasNewLimits 
kAllLabel 
kAutoP2HaveLimits 
kAutoP2NeedLimits 

Definition at line 26 of file TH1Merger.h.

Constructor & Destructor Documentation

◆ TH1Merger()

TH1Merger::TH1Merger ( TH1 h,
TCollection l,
Option_t opt = "" 
)
inline

Definition at line 62 of file TH1Merger.h.

◆ ~TH1Merger()

TH1Merger::~TH1Merger ( )
inline

Definition at line 78 of file TH1Merger.h.

Member Function Documentation

◆ AutoP2BufferMerge()

Bool_t TH1Merger::AutoP2BufferMerge ( )
private

Definition at line 577 of file TH1Merger.cxx.

◆ AutoP2BuildAxes()

Bool_t TH1Merger::AutoP2BuildAxes ( TH1 h)
private

Determine final boundaries and number of bins for histograms created in power-of-2 autobin mode.

Return kTRUE if compatible, updating fNewXaxis accordingly; return kFALSE if something wrong.

The histograms are not merge-compatible if

  1. have different variable-size bins
  2. larger bin size is not an integer multiple of the smaller one
  3. the final estimated range is smalle then the bin size

Definition at line 77 of file TH1Merger.cxx.

◆ AutoP2Merge()

Bool_t TH1Merger::AutoP2Merge ( )
private

Definition at line 620 of file TH1Merger.cxx.

◆ AxesHaveLimits()

Bool_t TH1Merger::AxesHaveLimits ( const TH1 h)
static

Definition at line 19 of file TH1Merger.cxx.

◆ BufferMerge()

Bool_t TH1Merger::BufferMerge ( )
private

Definition at line 718 of file TH1Merger.cxx.

◆ CheckForDuplicateLabels()

Int_t TH1Merger::CheckForDuplicateLabels ( const TH1 hist)
static

Check if histogram has duplicate labels Return an integer with bit set correponding on the axis that has duplicate labels e.g.

duplicate labels on x axis : return 1 duplicate labels on x and z axis : return 5

Definition at line 914 of file TH1Merger.cxx.

◆ CopyBuffer()

void TH1Merger::CopyBuffer ( TH1 hsrc,
TH1 hdes 
)
private

Definition at line 544 of file TH1Merger.cxx.

◆ DefineNewAxes()

void TH1Merger::DefineNewAxes ( )
private

Function to define new histogram axis when merging It is call only in case of merging with different axis or with the buffer (kHasNewLimits)

Definition at line 478 of file TH1Merger.cxx.

◆ DifferentAxesMerge()

Bool_t TH1Merger::DifferentAxesMerge ( )
private

Merged histogram when axis can be different.

Histograms are merged looking at bin center positions

Definition at line 797 of file TH1Merger.cxx.

◆ ExamineHistograms()

TH1Merger::EMergerType TH1Merger::ExamineHistograms ( )
private

Examine the list of histograms to find out which type of Merge we need to do Pass the input list containing the histogram to merge and h0 which is the initial histogram on which all the histogram of the list will be merged This are the possible cases:

  • 1. All histogram have the same axis (allSameLimits = true)
  • 2. Histogram have different axis but compatible (allSameLimits = false) and sameLimitsX,Y,Z specifies which axis has different limits
  • 3. Histogram do not have limits (so the Buffer is used) allHaveLimits = false
  • 3b. One histogram has limits the other not : allHaveLimits = false AND initialLimitsFound = true
  • 4. Histogram Have labels = allHaveLabels = true

Definition at line 216 of file TH1Merger.cxx.

◆ FindBinNumber()

static Int_t TH1Merger::FindBinNumber ( Int_t  ibin,
const TAxis inAxis,
TAxis outAxis 
)
inlinestatic

Definition at line 47 of file TH1Merger.h.

◆ FindFixBinNumber()

static Int_t TH1Merger::FindFixBinNumber ( Int_t  ibin,
const TAxis inAxis,
const TAxis outAxis 
)
inlinestatic

Definition at line 38 of file TH1Merger.h.

◆ HasDuplicateLabels()

Bool_t TH1Merger::HasDuplicateLabels ( const THashList labels)
static

Find a duplicate labels in an axis label list.

Definition at line 887 of file TH1Merger.cxx.

◆ LabelMerge()

Bool_t TH1Merger::LabelMerge ( )
private

Merge histograms with labels.

Definition at line 944 of file TH1Merger.cxx.

◆ operator()()

Bool_t TH1Merger::operator() ( )

Function performing the actual merge.

Definition at line 27 of file TH1Merger.cxx.

◆ SameAxesMerge()

Bool_t TH1Merger::SameAxesMerge ( )
private

Definition at line 744 of file TH1Merger.cxx.

Member Data Documentation

◆ fH0

TH1* TH1Merger::fH0
private

Definition at line 113 of file TH1Merger.h.

◆ fHClone

TH1* TH1Merger::fHClone
private

histogram on which the list is merged

Definition at line 114 of file TH1Merger.h.

◆ fInputList

TList TH1Merger::fInputList
private

copy of fH0 - managed by this class

Definition at line 115 of file TH1Merger.h.

◆ fNewAxisFlag

UInt_t TH1Merger::fNewAxisFlag
private

Definition at line 119 of file TH1Merger.h.

◆ fNewXAxis

TAxis TH1Merger::fNewXAxis
private

Definition at line 116 of file TH1Merger.h.

◆ fNewYAxis

TAxis TH1Merger::fNewYAxis
private

Definition at line 117 of file TH1Merger.h.

◆ fNewZAxis

TAxis TH1Merger::fNewZAxis
private

Definition at line 118 of file TH1Merger.h.

◆ fNoCheck

Bool_t TH1Merger::fNoCheck = kFALSE
private

Definition at line 112 of file TH1Merger.h.

◆ fNoLabelMerge

Bool_t TH1Merger::fNoLabelMerge = kFALSE
private

Definition at line 111 of file TH1Merger.h.


The documentation for this class was generated from the following files: