fix initialization of fInterval data member

this fises crash in rs701 tutorial


git-svn-id: http://root.cern.ch/svn/root/trunk@30756 27541ba8-7e3a-0410-8455-c3a389f83636

roofit/roostats/src/BayesianCalculator.cxx

@@ -40,6 +40,7 @@ BayesianCalculator::BayesianCalculator() :
   fPdf(0),
   fPriorPOI(0),
   fProductPdf (0), fLogLike(0), fLikelihood (0), fIntegratedLikelihood (0), fPosteriorPdf(0), 
+  fInterval(0),
   fSize(0.05)
 {
    // default constructor
@@ -57,6 +58,7 @@ BayesianCalculator::BayesianCalculator( /* const char* name,  const char* title,
   fPOI(POI),
   fPriorPOI(&priorPOI),
   fProductPdf (0), fLogLike(0), fLikelihood (0), fIntegratedLikelihood (0), fPosteriorPdf(0),
+  fInterval(0),
   fSize(0.05)
 {
    // constructor
@@ -69,6 +71,7 @@ BayesianCalculator::BayesianCalculator( RooAbsData& data,
    fPdf(model.GetPdf()),
    fPriorPOI( model.GetPriorPdf()),
    fProductPdf (0), fLogLike(0), fLikelihood (0), fIntegratedLikelihood (0), fPosteriorPdf(0),
+   fInterval(0),
    fSize(0.05)
 {
    // constructor from Model Config

tutorials/roostats/rs701_BayesianCalculator.C

@@ -24,10 +24,10 @@ using namespace RooStats;
 void rs701_BayesianCalculator()
 {
 
-/*
+
   RooWorkspace* w = new RooWorkspace("w",true);
-  w->factory("SUM::pdf(s[0,15]*Uniform(x[0,1]),b[0.001,0,2]*Uniform(x))");
-  w->factory("Gaussian::prior_b(b,0.001,1)");
+  w->factory("SUM::pdf(s[0,15]*Uniform(x[0,1]),b[1,0,2]*Uniform(x))");
+  w->factory("Gaussian::prior_b(b,1,1)");
   w->factory("PROD::model(pdf,prior_b)");
   RooAbsPdf* model = w->pdf("model");  // pdf*priorNuisance
   const RooArgSet nuisanceParameters(*(w->var("b")));
@@ -46,7 +46,7 @@ void rs701_BayesianCalculator()
   std::cout << "90% CL interval: [ " << interval->LowerLimit() << " - " << interval->UpperLimit() << " ] or 95% CL limits\n";
   RooPlot * plot = bcalc.GetPosteriorPlot();
   plot->Draw();
-*/
+
   
   // observe one event while expecting one background event -> the 95% CL upper limit on s is 4.10
   // observe one event while expecting zero background event -> the 95% CL upper limit on s is 4.74