doc/v628/rf502__wspacewrite_8C.html

#include "RooRealVar.h"

#include "RooDataSet.h"

#include "RooGaussian.h"

#include "RooChebychev.h"

#include "RooAddPdf.h"

#include "RooWorkspace.h"

#include "RooPlot.h"

#include "TCanvas.h"

#include "TAxis.h"

#include "TFile.h"

#include "TH1.h"

using namespace RooFit;


void rf502_wspacewrite()

{

   // C r e a t e   m o d e l   a n d   d a t a s e t

   // -----------------------------------------------


   // Declare observable x

   RooRealVar x("x", "x", 0, 10);


   // Create two Gaussian PDFs g1(x,mean1,sigma) anf g2(x,mean2,sigma) and their parameters

   RooRealVar mean("mean", "mean of gaussians", 5, 0, 10);

   RooRealVar sigma1("sigma1", "width of gaussians", 0.5);

   RooRealVar sigma2("sigma2", "width of gaussians", 1);


   RooGaussian sig1("sig1", "Signal component 1", x, mean, sigma1);

   RooGaussian sig2("sig2", "Signal component 2", x, mean, sigma2);


   // Build Chebychev polynomial pdf

   RooRealVar a0("a0", "a0", 0.5, 0., 1.);

   RooRealVar a1("a1", "a1", 0.2, 0, 1.);

   RooChebychev bkg("bkg", "Background", x, RooArgSet(a0, a1));


   // Sum the signal components into a composite signal pdf

   RooRealVar sig1frac("sig1frac", "fraction of component 1 in signal", 0.8, 0., 1.);

   RooAddPdf sig("sig", "Signal", RooArgList(sig1, sig2), sig1frac);


   // Sum the composite signal and background

   RooRealVar bkgfrac("bkgfrac", "fraction of background", 0.5, 0., 1.);

   RooAddPdf model("model", "g1+g2+a", RooArgList(bkg, sig), bkgfrac);


   // Generate a data sample of 1000 events in x from model

   RooDataSet *data = model.generate(x, 1000);


   // C r e a t e   w o r k s p a c e ,   i m p o r t   d a t a   a n d   m o d e l

   // -----------------------------------------------------------------------------


   // Create a new empty workspace

   RooWorkspace *w = new RooWorkspace("w", "workspace");


   // Import model and all its components into the workspace

   w->import(model);


   // Import data into the workspace

   w->import(*data);


   // Print workspace contents

   w->Print();


   // S a v e   w o r k s p a c e   i n   f i l e

   // -------------------------------------------


   // Save the workspace into a ROOT file

   w->writeToFile("rf502_workspace.root");


   // Workspace will remain in memory after macro finishes

   gDirectory->Add(w);

}

RooAddPdf.h

RooChebychev.h

RooDataSet.h

RooGaussian.h

RooPlot.h

RooRealVar.h

RooWorkspace.h

TAxis.h

TCanvas.h

gDirectory
#define gDirectory
Definition TDirectory.h:386

TFile.h

w
winID w
Definition TGWin32VirtualGLProxy.cxx:39

data
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void data
Definition TGWin32VirtualXProxy.cxx:104

TH1.h

RooAddPdf
RooAddPdf is an efficient implementation of a sum of PDFs of the form.
Definition RooAddPdf.h:34

RooArgList
RooArgList is a container object that can hold multiple RooAbsArg objects.
Definition RooArgList.h:22

RooArgSet
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition RooArgSet.h:55

RooChebychev
Chebychev polynomial p.d.f.
Definition RooChebychev.h:25

RooDataSet
RooDataSet is a container class to hold unbinned data.
Definition RooDataSet.h:57

RooGaussian
Plain Gaussian p.d.f.
Definition RooGaussian.h:24

RooRealVar
RooRealVar represents a variable that can be changed from the outside.
Definition RooRealVar.h:40

RooWorkspace
The RooWorkspace is a persistable container for RooFit projects.
Definition RooWorkspace.h:43

x
Double_t x[n]
Definition legend1.C:17

RooFit
The namespace RooFit contains mostly switches that change the behaviour of functions of PDFs (or othe...
Definition Common.h:18

rf502_wspacewrite
Definition rf502_wspacewrite.py:1