ComPWA::Data::Root Namespace Reference

Namespace with read/write functions for ROOT files. More...

Classes
class	RootAngleEfficiency
	Uses also TEfficiency object, but the variables are one invariant mass and the corresponding helicity angle. More...
class	RootEfficiency
	Efficiency provided by a histogram. More...
class	RootGenerator
class	RootUniformRealGenerator

Functions
std::vector< std::string >	pidsToUniqueStrings (std::vector< pid > Pids)
std::vector< pid >	uniqueStringsToPids (std::vector< std::string > UniqueStrings)
ComPWA::EventCollection	readData (const std::string &InputFileName, const std::string &TreeName, long long NumberEventsToRead=-1)
	Create a vector of Events from a ROOT file. More...
void	writeData (const EventCollection &OutputSample, const std::string &OutputFilePath, const std::string &TreeName, bool OverwriteFile=true)
	Write a vector of Events to a ROOT file. More...

Detailed Description

Namespace with read/write functions for ROOT files.

Function Documentation

pidsToUniqueStrings()

std::vector<std::string> ComPWA::Data::Root::pidsToUniqueStrings

(

std::vector< pid >

Pids

)

Definition at line 24 of file RootDataIO.cpp.

readData()

ComPWA::EventCollection ComPWA::Data::Root::readData	(	const std::string &	InputFileName,
		const std::string &	TreeName,
		long long	NumberEventsToRead = -1
	)

Create a vector of Events from a ROOT file.

The input file should have at least one event-based TTree with:

• A branch named "Particles" containing TClonesArrays. These arrays should contain TParticle objects with a defined 4-momentum.
• A branch of doubles called "Weight".

  Parameters

  InputFileName	Input ROOT file(s); can take wildcards, see TChain::Add.
  TreeName	Name of the event-based tree
  NumberEventsToRead	Limit the resulting vector to this number of events (optional).

1. Ignore custom streamer warning and error message for missing trees
2. Use TChain to add files through wildcards if necessary
3. Test TChain quality
4. Get PIDs
5. Set branch addresses
6. Import data sample

Definition at line 60 of file RootDataIO.cpp.

uniqueStringsToPids()

std::vector<pid> ComPWA::Data::Root::uniqueStringsToPids

(

std::vector< std::string >

UniqueStrings

)

Definition at line 46 of file RootDataIO.cpp.

writeData()

void ComPWA::Data::Root::writeData	(	const EventCollection &	OutputSample,
		const std::string &	OutputFilePath,
		const std::string &	TreeName,
		bool	OverwriteFile = true
	)

Write a vector of Events to a ROOT file.

See readData for the structure of the output file.

Parameters

OutputSample	List of Events including a info header
OutputFilePath	Path to the output ROOT file
TreeName	Name of the event-based output TTree in the file
OverwriteFile	Set to true if you do not want to append

1. Ignore custom streamer warning
2. Check EventCollection quality
3. Open or create ROOT file
4. Define TTree its branches
5. Fill tree

Definition at line 145 of file RootDataIO.cpp.