Standard demo of the ProfileInspector class StandardProfileInspectorDemo
This is a standard demo that can be used with any ROOT file prepared in the standard way. You specify:
With default parameters the macro will attempt to run the standard hist2workspace example and read the ROOT file that it produces.
The actual heart of the demo is only about 10 lines long.
The ProfileInspector plots the conditional maximum likelihood estimate of each nuisance parameter in the model vs. the parameter of interest. (aka. profiled value of nuisance parameter vs. parameter of interest) (aka. best fit nuisance parameter with p.o.i fixed vs. parameter of interest)
Author: Kyle Cranmer
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Thursday, June 30, 2022 at 10:04 AM.
%%cpp -d
#include "TFile.h"
#include "TROOT.h"
#include "TCanvas.h"
#include "TList.h"
#include "TMath.h"
#include "TSystem.h"
#include "RooWorkspace.h"
#include "RooAbsData.h"
#include "RooStats/ModelConfig.h"
#include "RooStats/ProfileInspector.h"
%%cpp -d
// This is a workaround to make sure the namespace is used inside functions
using namespace RooFit;
using namespace RooStats;
Arguments are defined.
const char *infile = "";
const char *workspaceName = "combined";
const char *modelConfigName = "ModelConfig";
const char *dataName = "obsData";
First part is just to access a user-defined file or create the standard example file if it doesn't exist
const char *filename = "";
if (!strcmp(infile, "")) {
filename = "results/example_combined_GaussExample_model.root";
bool fileExist = !gSystem->AccessPathName(filename); // note opposite return code
// if file does not exists generate with histfactory
if (!fileExist) {
#ifdef _WIN32
cout << "HistFactory file cannot be generated on Windows - exit" << endl;
return;
#endif
// Normally this would be run on the command line
cout << "will run standard hist2workspace example" << endl;
gROOT->ProcessLine(".! prepareHistFactory .");
gROOT->ProcessLine(".! hist2workspace config/example.xml");
cout << "\n\n---------------------" << endl;
cout << "Done creating example input" << endl;
cout << "---------------------\n\n" << endl;
}
} else
filename = infile;
Try to open the file
TFile *file = TFile::Open(filename);
If input file was specified byt not found, quit
if (!file) {
cout << "StandardRooStatsDemoMacro: Input file " << filename << " is not found" << endl;
return;
}
Get the workspace out of the file
RooWorkspace *w = (RooWorkspace *)file->Get(workspaceName);
if (!w) {
cout << "workspace not found" << endl;
return;
}
Get the modelconfig out of the file
ModelConfig *mc = (ModelConfig *)w->obj(modelConfigName);
Get the modelconfig out of the file
RooAbsData *data = w->data(dataName);
Make sure ingredients are found
if (!data || !mc) {
w->Print();
cout << "data or ModelConfig was not found" << endl;
return;
}
now use the profile inspector
ProfileInspector p;
TList *list = p.GetListOfProfilePlots(*data, mc);
Now make plots
TCanvas *c1 = new TCanvas("c1", "ProfileInspectorDemo", 800, 200);
if (list->GetSize() > 4) {
double n = list->GetSize();
int nx = (int)sqrt(n);
int ny = TMath::CeilNint(n / nx);
nx = TMath::CeilNint(sqrt(n));
c1->Divide(ny, nx);
} else
c1->Divide(list->GetSize());
for (int i = 0; i < list->GetSize(); ++i) {
c1->cd(i + 1);
list->At(i)->Draw("al");
}
cout << endl;
Draw all canvases
%jsroot on
gROOT->GetListOfCanvases()->Draw()