#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussian.h"
#include "TCanvas.h"
#include "TAxis.h"
#include "RooPlot.h"
#include "RooFitResult.h"
#include "RooGenericPdf.h"
#include "RooConstVar.h"

using namespace RooFit ;


void savewpace(){

  RooRealVar x("x","x",-20,20) ;
  RooRealVar alpha("alpha","alpha",5,0.1,10) ;

  TString format_a = "(1+0.1*abs(x)+sin(sqrt(abs(x*alpha+0.2))))";
  TString format_b = "(1+0.1*x**2+0.2*x**3)";
  TString format = TString::Format("%s*%s",format_a.Data(),format_b.Data());

  RooGenericPdf genpdf("genpdf","genpdf",format,RooArgSet(x,alpha)) ;

  RooWorkspace *wspace = new RooWorkspace("wspace","wspace");
  wspace->import(genpdf);
  wspace->writeToFile("wspace_signal.root");


}