Logo ROOT   6.11/03
Reference Guide
Classes
Tree Library

To store large quantities of same-class objects, ROOT provides the TTree and TNtuple classes.

The TTree class is optimized to reduce disk space and enhance access speed. A TNtuple is a TTree that is limited to only hold floating-point numbers; a TTree on the other hand can hold all kind of data, such as objects or arrays in addition to all the simple types.

Classes

class  TBasket
 Manages buffers for branches of a Tree. More...
 
class  TBasketSQL
 Implement TBasket for a SQL backend. More...
 
class  TBranch
 A TTree is a list of TBranches. More...
 
class  TBranchClones
 A Branch for the case of an array of clone objects. More...
 
class  TBranchElement
 A Branch for the case of an object. More...
 
class  TBranchObject
 A Branch for the case of an object. More...
 
class  TBranchRef
 A branch containing and managing a TRefTable for TRef autoloading. More...
 
class  TBranchSTL
 A Branch handling STL collection of pointers (vectors, lists, queues, sets and multisets) while storing them in split mode. More...
 
class  TBufferSQL
 Implement TBuffer for a SQL backend. More...
 
class  TChain
 A chain is a collection of files containing TTree objects. More...
 
class  TChainElement
 A TChainElement describes a component of a TChain. More...
 
class  TCollectionMethodBrowsable
 TCollectionMethodBrowsable extends TCollectionPropertyBrowsable by showing all methods of the collection itself. More...
 
class  TCollectionPropertyBrowsable
 A tiny browser helper object (and its generator) for adding a virtual (as in "not actually part of the class", not in C++ virtual) "@size()" method to a collection. More...
 
class  TCut
 A specialized string object used for TTree selections. More...
 
class  TEntryList
 A List of entry numbers in a TTree or TChain. More...
 
class  TEntryListArray
 A list of entries and subentries in a TTree or TChain. More...
 
class  TEntryListBlock
 Used by TEntryList to store the entry numbers. More...
 
class  TEntryListFromFile
 Manages entry lists from different files, when they are not loaded in memory at the same time. More...
 
class  TEventList
 A TEventList object is a list of selected events (entries) in a TTree. More...
 
class  TFriendElement
 A TFriendElement TF describes a TTree object TF in a file. More...
 
class  ROOT::TIOFeatures
 TIOFeatures provides the end-user with the ability to change the IO behavior of data written via a TTree. More...
 
class  TLeaf
 A TLeaf describes individual elements of a TBranch See TBranch structure in TTree. More...
 
class  TLeafB
 A TLeaf for an 8 bit Integer data type. More...
 
class  TLeafC
 A TLeaf for a variable length string. More...
 
class  TLeafD
 A TLeaf for a 64 bit floating point data type. More...
 
class  TLeafElement
 A TLeaf for the general case when using the branches created via a TStreamerInfo (i.e. More...
 
class  TLeafF
 A TLeaf for a 32 bit floating point data type. More...
 
class  TLeafI
 A TLeaf for an Integer data type. More...
 
class  TLeafL
 A TLeaf for a 64 bit Integer data type. More...
 
class  TLeafO
 A TLeaf for a bool data type. More...
 
class  TLeafObject
 A TLeaf for a general object derived from TObject. More...
 
class  TLeafS
 A TLeaf for a 16 bit Integer data type. More...
 
class  TMethodBrowsable
 This helper object allows the browsing of methods of objects stored in branches. More...
 
class  TNonSplitBrowsable
 Allows a TBrowser to browse non-split branches as if they were split. More...
 
class  TNtuple
 A simple TTree restricted to a list of float variables only. More...
 
class  TNtupleD
 A simple TTree restricted to a list of double variables only. More...
 
class  TQueryResult
 A container class for query results. More...
 
class  TSelector
 A TSelector object is used by the TTree::Draw, TTree::Scan, TTree::Process to navigate in a TTree and make selections. More...
 
class  TSelectorList
 A TList derived class that makes sure that objects added to it are not linked to the currently open file (like histograms, eventlists and trees). More...
 
class  TSelectorScalar
 Named scalar type, based on Long64_t, streamable, storable and mergable. More...
 
class  TTree
 A TTree object has a header with a name and a title. More...
 
class  TTreeCache
 A specialized TFileCacheRead object for a TTree. More...
 
class  TTreeCacheUnzip
 Specialization of TTreeCache for parallel Unzipping. More...
 
class  TTreeCloner
 Class implementing or helping the various TTree cloning method. More...
 
class  TTreeResult
 Class defining interface to a TTree query result with the same interface as for SQL databases. More...
 
class  TTreeRow
 Class defining interface to a row of a TTree query result. More...
 
class  TTreeSQL
 Implement TTree for a SQL backend. More...
 
class  TVirtualBranchBrowsable
 TVirtualBranchBrowsable is a base class (not really abstract, but useless by itself) for helper objects that extend TBranch's browsing support. More...
 
class  TVirtualIndex
 Abstract interface for Tree Index. More...
 
class  TVirtualTreePlayer
 Abstract base class defining the interface for the plugins that implement Draw, Scan, Process, MakeProxy, etc. More...