library: libRooFit #include "RooTreeData.h"

# RooTreeData

class description - source file - inheritance tree (.pdf)

## class RooTreeData : public RooAbsData

| Inheritance Chart:

`TObject`

<-

`TNamed`

`RooPrintable`

<-

`RooAbsData`

<-

`RooTreeData`

<-

`RooDataHist` |

`RooDataSet` |

This is an abstract class, constructors will not be documented.
Look at the header to check for available constructors.

        private:

          void initialize()

        protected:

          virtual void cacheArgs(RooArgSet& varSet, const RooArgSet* nset = 0)
          const TTree& cacheTree() const
                  void checkInit() const
                  void createTree(const char* name, const char* title)
                 Int_t Fill()
                 Int_t getBranchBufferSize() const
                Stat_t GetEntries() const
                 Int_t GetEntry(Int_t entry = 0, Int_t getall = 0)
                  void initCache(const RooArgSet& cachedVars)
                  void loadValues(const RooTreeData* t, RooFormulaVar* select = 0, const char* rangeName = "0", Int_t nStart = 0, Int_t nStop = 2000000000)
                  void loadValues(const TTree* t, RooFormulaVar* cutVar = 0, const char* rangeName = "0", Int_t nStart = 0, Int_t nStop = 2000000000)
                  void loadValues(const char* filename, const char* treename, RooFormulaVar* cutVar = 0)
                  void Reset(Option_t* option = "0")
          virtual void resetCache()
                 Int_t ScanCache(const char* varexp = "", const char* selection = "", Option_t* option = "", Int_t nentries = 1000000000, Int_t firstentry = 0)
          virtual void setArgStatus(const RooArgSet& set, Bool_t active)
                  void setBranchBufferSize(Int_t size)
                  void treePrint()

        public:

                           virtual ~RooTreeData()
                virtual RooAbsArg* addColumn(RooAbsArg& var)
                virtual RooArgSet* addColumns(const RooArgList& varList)
                    static TClass* Class()
                              void dump()
                      virtual void fill()
                      virtual TH1* fillHistogram(TH1* hist, const RooArgList& plotVars, const char* cuts = "", const char* cutRange = "0") const
          virtual const RooArgSet* get(Int_t index) const
          virtual const RooArgSet* get() const
                            Bool_t getRange(RooRealVar& var, Double_t& lowest, Double_t& highest) const
                   virtual TClass* IsA() const
                       RooRealVar* meanVar(RooRealVar& var, const char* cutSpec = "0", const char* cutRange = "0") const
                          Double_t moment(RooRealVar& var, Double_t order, Double_t offset = 0, const char* cutSpec = "0", const char* cutRange = "0") const
                     virtual Int_t numEntries(Bool_t useWeights = kFALSE) const
                      RooTreeData& operator=(const RooTreeData&)
                  virtual RooPlot* plotAsymOn(RooPlot* frame, const RooAbsCategoryLValue& asymCat, RooTreeData::PlotOpt o) const
                  virtual RooPlot* plotOn(RooPlot* frame, const RooLinkedList& cmdList) const
                  virtual RooPlot* plotOn(RooPlot* frame, RooTreeData::PlotOpt o) const
                      virtual void printToStream(ostream& os, RooPrintable::PrintOption opt, TString indent) const
                      virtual void reset()
                       RooRealVar* rmsVar(RooRealVar& var, const char* cutSpec = "0", const char* cutRange = "0") const
                             Int_t Scan(const char* varexp = "", const char* selection = "", Option_t* option = "", Int_t nentries = 1000000000, Int_t firstentry = 0)
                      virtual void ShowMembers(TMemberInspector& insp, char* parent)
                    virtual TList* split(const RooAbsCategory& splitCat) const
                  virtual RooPlot* statOn(RooPlot* frame, const RooCmdArg& arg1 = RooCmdArg::none, const RooCmdArg& arg2 = RooCmdArg::none, const RooCmdArg& arg3 = RooCmdArg::none, const RooCmdArg& arg4 = RooCmdArg::none, const RooCmdArg& arg5 = RooCmdArg::none, const RooCmdArg& arg6 = RooCmdArg::none, const RooCmdArg& arg7 = RooCmdArg::none, const RooCmdArg& arg8 = RooCmdArg::none)
                  virtual RooPlot* statOn(RooPlot* frame, const char* what, const char* label = "", Int_t sigDigits = 2, Option_t* options = "NELU", Double_t xmin = 0.15, Double_t xmax = 0.65, Double_t ymax = 0.85, const char* cutSpec = "0", const char* cutRange = "0", const RooCmdArg* formatCmd = 0)
                      virtual void Streamer(TBuffer& b)
                              void StreamerNVirtual(TBuffer& b)
               virtual Roo1DTable* table(const RooAbsCategory& cat, const char* cuts = "", const char* opts = "") const
                      const TTree& tree() const

### Data Members

        protected:

                TTree* _tree            TTree holding the data points
                TTree* _cacheTree       ! TTree holding the cached function values
                Bool_t _defCtor         ! Was object constructed with default ctor?
             RooArgSet _truth           Truth variables
               TString _blindString     Blinding string (optionally read from ASCII files)
          static Int_t _defTreeBufSize

## Class Description

void createTree(const char* name, const char* title)

     Create TTree object that lives in memory, independent of current
     location of gDirectory

~RooTreeData()

     Destructor

void initialize()

     Attach variables of internal ArgSet
     to the corresponding TTree branches

void initCache(const RooArgSet& cachedVars)

     Initialize cache of dataset: attach variables of cache ArgSet
     to the corresponding TTree branches

void loadValues(const char *filename, const char *treename, RooFormulaVar* cutVar)

     Load TTree name 'treename' from file 'filename' and pass call
     to loadValue(TTree*,...)

void loadValues(const RooTreeData *t, RooFormulaVar* select, const char* rangeName, Int_t nStart, Int_t nStop)

     Load values from dataset 't' into this data collection, optionally
     selecting events using 'select' RooFormulaVar

void loadValues(const TTree *t, RooFormulaVar* select, const char* /*rangeName*/, Int_t /*nStart*/, Int_t /*nStop*/)

     Load values from tree 't' into this data collection, optionally
     selecting events using 'select' RooFormulaVar

     The source tree 't' is first clone as not disturb its branch
     structure when retrieving information from it.

void dump()

     DEBUG: Dump contents

void resetCache()

     Reset the cache

void setArgStatus(const RooArgSet& set, Bool_t active)

void cacheArgs(RooArgSet& newVarSet, const RooArgSet* nset)

     Cache given RooAbsArgs with this tree: The tree is
     given direct write access of the args internal cache
     the args values is pre-calculated for all data points
     in this data collection. Upon a get() call, the
     internal cache of 'newVar' will be loaded with the
     precalculated value and it's dirty flag will be cleared.

const RooArgSet* get(Int_t index) const

     Load the n-th data point (n='index') in memory
     and return a pointer to the internal RooArgSet
     holding its coordinates.

RooAbsArg* addColumn(RooAbsArg& newVar)

     Add a new column to the data set which holds the pre-calculated values
     of 'newVar'. This operation is only meaningful if 'newVar' is a derived
     value.

     The return value points to the added element holding 'newVar's value
     in the data collection. The element is always the corresponding fundamental
     type of 'newVar' (e.g. a RooRealVar if 'newVar' is a RooFormulaVar)

     Note: This function is explicitly NOT intended as a speed optimization
           opportunity for the user. Components of complex PDFs that can be
           precalculated with the dataset are automatically identified as such
           and will be precalculated when fitting to a dataset

           By forcibly precalculating functions with non-trivial Jacobians,
           or functions of multiple variables occurring in the data set,
           using addColumn(), you may alter the outcome of the fit.

           Only in cases where such a modification of fit behaviour is intentional,
           this function should be used. (E.g collapsing a continuous B0 flavour
           probability into a 2-state B0/B0bar category)

RooArgSet* addColumns(const RooArgList& varList)

TList* split(const RooAbsCategory& splitCat) const

     Sanity check

RooPlot* plotOn(RooPlot* frame, const RooLinkedList& argList) const

     Plot dataset on specified frame. By default an unbinned dataset will use the default binning of
     the target frame. A binned dataset will by default retain its intrinsic binning.

     The following optional named arguments can be used to modify the default behavior

     Data representation options
     ---------------------------
     Asymmetry(const RooCategory& c) -- Show the asymmetry of the daya in given two-state category [F(+)-F(-)] / [F(+)+F(-)].
                                        Category must have two states with indices -1 and +1 or three states with indeces -1,0 and +1.
     ErrorType(RooAbsData::EType)    -- Select the type of error drawn: Poisson (default) draws asymmetric Poisson
                                        confidence intervals. SumW2 draws symmetric sum-of-weights error
     Binning(double xlo, double xhi, -- Use specified binning to draw dataset
                          int nbins)
     Binning(const RooAbsBinning&)   -- Use specified binning to draw dataset
     Binning(const char* name)       -- Use binning with specified name to draw dataset
     RefreshNorm(Bool_t flag)        -- Force refreshing for PDF normalization information in frame.
                                        If set, any subsequent PDF will normalize to this dataset, even if it is
                                        not the first one added to the frame. By default only the 1st dataset
                                        added to a frame will update the normalization information

     Histogram drawing options
     -------------------------
     DrawOption(const char* opt)     -- Select ROOT draw option for resulting TGraph object
     LineStyle(Int_t style)          -- Select line style by ROOT line style code, default is solid
     LineColor(Int_t color)          -- Select line color by ROOT color code, default is black
     LineWidth(Int_t width)          -- Select line with in pixels, default is 3
     MarkerStyle(Int_t style)        -- Select the ROOT marker style, default is 21
     MarkerColor(Int_t color)        -- Select the ROOT marker color, default is black
     MarkerSize(Double_t size)       -- Select the ROOT marker size
     XErrorSize(Double_t frac)       -- Select size of X error bar as fraction of the bin width, default is 1

     Misc. other options
     -------------------
     Name(const chat* name)          -- Give curve specified name in frame. Useful if curve is to be referenced later
     Invisble(Bool_t flag)           -- Add curve to frame, but do not display. Useful in combination AddTo()
     AddTo(const char* name,         -- Add constructed histogram to already existing histogram with given name and relative weight factors
     double_t wgtSelf, double_t wgtOther)

RooPlot* plotOn(RooPlot *frame, PlotOpt o) const

     Create and fill a histogram of the frame's variable and append it to the frame.
     The frame variable must be one of the data sets dimensions.

     The plot range and the number of plot bins is determined by the parameters
     of the plot variable of the frame (RooAbsReal::setPlotRange(), RooAbsReal::setPlotBins())

     The optional cut string expression can be used to select the events to be plotted.
     The cut specification may refer to any variable contained in the data set

     The drawOptions are passed to the TH1::Draw() method

RooPlot* plotAsymOn(RooPlot* frame, const RooAbsCategoryLValue& asymCat, PlotOpt o) const

     Create and fill a histogram with the asymmetry N[+] - N[-] / ( N[+] + N[-] ),
     where N(+/-) is the number of data points with asymCat=+1 and asymCat=-1
     as function of the frames variable. The asymmetry category 'asymCat' must
     have exactly 2 (or 3) states defined with index values +1,-1 (and 0)

     The plot range and the number of plot bins is determined by the parameters
     of the plot variable of the frame (RooAbsReal::setPlotRange(), RooAbsReal::setPlotBins())

     The optional cut string expression can be used to select the events to be plotted.
     The cut specification may refer to any variable contained in the data set

     The drawOptions are passed to the TH1::Draw() method

TH1* fillHistogram(TH1 *hist, const RooArgList &plotVars, const char *cuts, const char* cutRange) const

     Loop over columns of our tree data and fill the input histogram. Returns a pointer to the
     input histogram, or zero in case of an error. The input histogram can be any TH1 subclass, and
     therefore of arbitrary dimension. Variables are matched with the (x,y,...) dimensions of the input
     histogram according to the order in which they appear in the input plotVars list.

Roo1DTable* table(const RooAbsCategory& cat, const char* cuts, const char* /*opts*/) const

     Create and fill a 1-dimensional table for given category column
     This functions is the equivalent of plotOn() for category dimensions.

     The optional cut string expression can be used to select the events to be tabulated
     The cut specification may refer to any variable contained in the data set

     The option string is currently not used

Double_t moment(RooRealVar &var, Double_t order, Double_t offset, const char* cutSpec, const char* cutRange) const

     Lookup variable in dataset

RooRealVar* meanVar(RooRealVar &var, const char* cutSpec, const char* cutRange) const

     Create a new variable with appropriate strings. The error is calculated as
     RMS/Sqrt(N) which is generally valid.

RooRealVar* rmsVar(RooRealVar &var, const char* cutSpec, const char* cutRange) const

     Create a new variable with appropriate strings. The error is calculated as
     RMS/(2*Sqrt(N)) which is only valid if the variable has a Gaussian distribution.

Bool_t getRange(RooRealVar& var, Double_t& lowest, Double_t& highest) const

     Lookup variable in dataset

RooPlot* statOn(RooPlot* frame, const RooCmdArg& arg1, const RooCmdArg& arg2, const RooCmdArg& arg3, const RooCmdArg& arg4, const RooCmdArg& arg5, const RooCmdArg& arg6, const RooCmdArg& arg7, const RooCmdArg& arg8)

     Add a box with statistics information to the specified frame. By default a box with the
     event count, mean and rms of the plotted variable is added.

     The following optional named arguments are accepted

       What(const char* whatstr)          -- Controls what is printed: "N" = count, "M" is mean, "R" is RMS.
       Format(const char* optStr)         -- Classing [arameter formatting options, provided for backward compatibility
       Format(const char* what,...)       -- Parameter formatting options, details given below
       Label(const chat* label)           -- Add header label to parameter box
       Layout(Double_t xmin,              -- Specify relative position of left,right side of box and top of box. Position of
           Double_t xmax, Double_t ymax)     bottom of box is calculated automatically from number lines in box
       Cut(const char* expression)        -- Apply given cut expression to data when calculating statistics
       CutRange(const char* rangeName)    -- Only consider events within given range when calculating statistics. Multiple
                                             CutRange() argument may be specified to combine ranges

     The Format(const char* what,...) has the following structure

       const char* what          -- Controls what is shown. "N" adds name, "E" adds error,
                                    "A" shows asymmetric error, "U" shows unit, "H" hides the value
       FixedPrecision(int n)     -- Controls precision, set fixed number of digits
       AutoPrecision(int n)      -- Controls precision. Number of shown digits is calculated from error
                                    + n specified additional digits (1 is sensible default)
       VerbatimName(Bool_t flag) -- Put variable name in a \verb+   + clause.

RooPlot* statOn(RooPlot* frame, const char* what, const char *label, Int_t sigDigits, Option_t *options, Double_t xmin, Double_t xmax, Double_t ymax, const char* cutSpec, const char* cutRange, const RooCmdArg* formatCmd)

Int_t numEntries(Bool_t) const

void printToStream(ostream& os, PrintOption opt, TString indent) const

     Print info about this dataset to the specified output stream.

       Standard: number of entries
          Shape: list of variables we define & were generated with

### Inline Functions

                        void fill()
            const RooArgSet* get() const
                        void reset()
                       Int_t Scan(const char* varexp = "", const char* selection = "", Option_t* option = "", Int_t nentries = 1000000000, Int_t firstentry = 0)
                const TTree& tree() const
                       Int_t ScanCache(const char* varexp = "", const char* selection = "", Option_t* option = "", Int_t nentries = 1000000000, Int_t firstentry = 0)
                const TTree& cacheTree() const
                      Stat_t GetEntries() const
                        void Reset(Option_t* option = "0")
                       Int_t Fill()
                       Int_t GetEntry(Int_t entry = 0, Int_t getall = 0)
                        void treePrint()
                        void setBranchBufferSize(Int_t size)
                       Int_t getBranchBufferSize() const
                        void checkInit() const
                     TClass* Class()
                     TClass* IsA() const
                        void ShowMembers(TMemberInspector& insp, char* parent)
                        void Streamer(TBuffer& b)
                        void StreamerNVirtual(TBuffer& b)
                RooTreeData& operator=(const RooTreeData&)

Last update: Tue Jun 28 18:15:40 2005
Copyright (c) 2000-2005, Regents of the University of California *