GaudiAlg.Algs.HistoAlgo Class Reference

Inheritance diagram for GaudiAlg.Algs.HistoAlgo:

Collaboration diagram for GaudiAlg.Algs.HistoAlgo:

Detailed Description

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*                                                * 'Physisics do not like it, *
*                                                *  physisics do not need it, *
*                                                *  physisics do not use  it' *
*                                                * ****************************
*  Usage:                                                                     *
*                                                                             *
*  from GaudiAlg.Algs import HistoAlgo, SUCCESS                                    *
*                                                                             *
*  class MyClass(HistoAlgo) :                                                 *
*       ' My specific Algorithm, derived from GaudiAlgo base class '          *
*       def __init__( self , name , **args ) :                                *
*            'Constructor from algorithm instance name'                       *
*             #invoke the constructor of base class                           *
*             HistoAlgo.__init__(self , name , **args )                       *
*                                                                             *
*       def execute ( self ) :                                                *
*            'Major method (from IAlgorithm interface)'                       *
*                                                                             *
*           # get some data from Transient Event Store                        *
*           tracks = self.get('/Event/Rec/Tracks')                            *
*                                                                             *
*           self.plot1D ( tracks->size() , '#tracks' , 0 , 100 )              *
*                                                                             *
*           return SUCCESS                                                    *
*                                                                             *
* Alternatively the histogram  could be booked in advance:                    *
*                                                                             *
*  class MyClass(HistoAlgo) :                                                 *
*       ' My specific Algorithm, derived from GaudiAlgo base class '          *
*       def __init__( self , name ) :                                         *
*            'Constructor from algorithm instance name'                       *
*             #invoke the constructor of base class                           *
*             HistoAlgo.__init__(self , name )                                *
*                                                                             *
*       def initialize ( self ) :                                             *
*           'Algorithm initialization'                                        *
*           # initialize the base class                                       *
*           status = HistoAlgo.initialize( self )                             *
*           if status.isFailure() : return status                             *
*                                                                             *
*           # book the histogram                                              *
*           self.h1 = selff.book1D ( '#tracks' , 0 , 100 )                    *
*                                                                             *
*           return SUCCESS                                                    *
*                                                                             *
*                                                                             *
*       def execute ( self ) :                                                *
*            'Major method (from IAlgorithm interface)'                       *
*                                                                             *
*           # get some data from Transient Event Store                        *
*           tracks = self.get('/Event/Rec/Tracks')                            *
*                                                                             *
*           # fill the histogram                                              *
*           self.h1.fill ( tracks->size() )                                   *
*                                                                             *
*           return SUCCESS                                                    *
*                                                                             *
*******************************************************************************

Definition at line 768 of file Algs.py.

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

• GaudiAlg/python/GaudiAlg/Algs.py