Logo ROOT  
Reference Guide
rf405_realtocatfuncs.C File Reference

Detailed Description

View in nbviewer Open in SWAN Data and categories: demonstration of real-->discrete mapping functions

[#1] INFO:Plotting -- RooTreeData::plotOn: plotting 2748 events out of 10000 total events
Table xBins : aData
| x_coarse_bin0 | 105 |
| x_coarse_bin1 | 329 |
| x_coarse_bin2 | 499 |
| x_coarse_bin3 | 739 |
| x_coarse_bin4 | 934 |
| x_coarse_bin5 | 1218 |
| x_coarse_bin6 | 1450 |
| x_coarse_bin7 | 1675 |
| x_coarse_bin8 | 1767 |
| x_coarse_bin9 | 1284 |
[#1] INFO:Plotting -- RooPlot::updateFitRangeNorm: New event count of 2627 will supercede previous event count of 10000 for normalization of PDF projections
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "RooConstVar.h"
#include "RooCategory.h"
#include "Roo1DTable.h"
#include "RooArgusBG.h"
#include "TCanvas.h"
#include "TAxis.h"
#include "RooPlot.h"
using namespace RooFit;
// D e f i n e p d f i n x , s a m p l e d a t a s e t i n x
// ------------------------------------------------------------------------
// Define a dummy PDF in x
RooRealVar x("x", "x", 0, 10);
RooArgusBG a("a", "argus(x)", x, RooConst(10), RooConst(-1));
// Generate a dummy dataset
RooDataSet *data = a.generate(x, 10000);
// C r e a t e a t h r e s h o l d r e a l - > c a t f u n c t i o n
// --------------------------------------------------------------------------
// A RooThresholdCategory is a category function that maps regions in a real-valued
// input observable observables to state names. At construction time a 'default'
// state name must be specified to which all values of x are mapped that are not
// otherwise assigned
RooThresholdCategory xRegion("xRegion", "region of x", x, "Background");
// Specify thresholds and state assignments one-by-one.
// Each statement specifies that all values _below_ the given value
// (and above any lower specified threshold) are mapped to the
// category state with the given name
// Background | SideBand | Signal | SideBand | Background
// 4.23 5.23 8.23 9.23
xRegion.addThreshold(4.23, "Background");
xRegion.addThreshold(5.23, "SideBand");
xRegion.addThreshold(8.23, "Signal");
xRegion.addThreshold(9.23, "SideBand");
// U s e t h r e s h o l d f u n c t i o n t o p l o t d a t a r e g i o n s
// -------------------------------------------------------------------------------------
// Add values of threshold function to dataset so that it can be used as observable
// Make plot of data in x
RooPlot *xframe = x.frame(Title("Demo of threshold and binning mapping functions"));
// Use calculated category to select sideband data
data->plotOn(xframe, Cut("xRegion==xRegion::SideBand"), MarkerColor(kRed), LineColor(kRed));
// C r e a t e a b i n n i n g r e a l - > c a t f u n c t i o n
// ----------------------------------------------------------------------
// A RooBinningCategory is a category function that maps bins of a (named) binning definition
// in a real-valued input observable observables to state names. The state names are automatically
// constructed from the variable name, the binning name and the bin number. If no binning name
// is specified the default binning is mapped
x.setBins(10, "coarse");
RooBinningCategory xBins("xBins", "coarse bins in x", x, "coarse");
// U s e b i n n i n g f u n c t i o n f o r t a b u l a t i o n a n d p l o t t i n g
// -----------------------------------------------------------------------------------------------
// Print table of xBins state multiplicity. Note that xBins does not need to be an observable in data
// it can be a function of observables in data as well
Roo1DTable *xbtable = data->table(xBins);
// Add values of xBins function to dataset so that it can be used as observable
RooCategory *xb = (RooCategory *)data->addColumn(xBins);
// Define range "alt" as including bins 1,3,5,7,9
xb->setRange("alt", "x_coarse_bin1,x_coarse_bin3,x_coarse_bin5,x_coarse_bin7,x_coarse_bin9");
// Construct subset of data matching range "alt" but only for the first 5000 events and plot it on the frame
RooDataSet *dataSel = (RooDataSet *)data->reduce(CutRange("alt"), EventRange(0, 5000));
dataSel->plotOn(xframe, MarkerColor(kGreen), LineColor(kGreen));
new TCanvas("rf405_realtocatfuncs", "rf405_realtocatfuncs", 600, 600);
@ kRed
Definition: Rtypes.h:66
@ kGreen
Definition: Rtypes.h:66
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void data
#define gPad
Definition: TVirtualPad.h:288
Roo1DTable implements a one-dimensional table.
Definition: Roo1DTable.h:23
void Print(Option_t *options=0) const override
Print TNamed name and title.
Definition: Roo1DTable.h:50
virtual RooPlot * plotOn(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()) const
Definition: RooAbsData.cxx:606
RooArgusBG is a RooAbsPdf implementation describing the ARGUS background shape.
Definition: RooArgusBG.h:22
Class RooBinningCategory provides a real-to-category mapping defined by a series of thresholds.
RooCategory is an object to represent discrete states.
Definition: RooCategory.h:28
void setRange(const char *rangeName, const char *stateNameList)
RooDataSet is a container class to hold unbinned data.
Definition: RooDataSet.h:55
A RooPlot is a plot frame and a container for graphics objects within that frame.
Definition: RooPlot.h:43
void Draw(Option_t *options=0) override
Draw this plot and all of the elements it contains.
Definition: RooPlot.cxx:679
virtual void SetMinimum(double minimum=-1111)
Set minimum value of Y axis.
Definition: RooPlot.cxx:1089
TAxis * GetYaxis() const
Definition: RooPlot.cxx:1270
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:40
The RooThresholdCategory provides a real-to-category mapping defined by a series of thresholds.
virtual void SetTitleOffset(Float_t offset=1)
Set distance between the axis and the axis title.
Definition: TAttAxis.cxx:301
The Canvas class.
Definition: TCanvas.h:23
RooConstVar & RooConst(double val)
RooCmdArg EventRange(Int_t nStart, Int_t nStop)
RooCmdArg MarkerColor(Color_t color)
RooCmdArg CutRange(const char *rangeName)
RooCmdArg Cut(const char *cutSpec)
RooCmdArg LineColor(Color_t color)
Double_t x[n]
Definition: legend1.C:17
The namespace RooFit contains mostly switches that change the behaviour of functions of PDFs (or othe...
Definition: Common.h:18
const char * Title
Definition: TXMLSetup.cxx:68
TArc a
Definition: textangle.C:12
July 2008
Wouter Verkerke

Definition in file rf405_realtocatfuncs.C.