FooFit

Intuitive interface to RooFit

Table of contents

• Release notes
• Installation
• Quick start
• Class hierarchy

Release notes

0.1.0

November 5, 2019

• initial public release

Installation

Dependencies

• ROOT 6 (with RooFit and Minuit2 support)
• CMake 2.8

Installation

cd /some/directory
git clone https://github.com/werthm/FooFit.git
cd FooFit
mkdir build
cd build
cmake ..
make
make install
export LD_LIBRARY_PATH="/some/directory/FooFit/build/lib:$LD_LIBRARY_PATH"
export ROOT_INCLUDE_PATH="/some/directory/FooFit/build/include:$ROOT_INCLUDE_PATH"

It is recommended to set the LD_LIBRARY_PATH and ROOT_INCLUDE_PATH variables in your shell configuration file.

Quick start

If LD_LIBRARY_PATH and ROOT_INCLUDE_PATH are set, root should be able to find the library automatically. If not, there are several ways to load the library:

ROOT command line interface:

root [0] gSystem->Load("libFooFit.so");

Interpreted macros:

void FooFitMacro()
{
  gSystem->Load("libFooFit.so");
  ...
}

Compiled macros:

root [0] .include /some/directory/FooFit/build/include
root [1] .x FooFitMacro.C++

Class hierarchy

FFRooModel             : base model pdf class
  FFRooModelPol        : polynomial function model
  FFRooModelChebychev  : Chebychev polynomial function model
  FFRooModelExpo       : exponential function model
  FFRooModelGauss      : Gaussian function model
  FFRooModelGaussBifur : bifurcated Gaussian function model
  FFRooModelLandau     : Landau function model
  FFRooModelHist       : histogram-based model
  FFRooModelKeys       : model using kernel estimation
  FFRooModelComp       : base class for composite models
    FFRooModelSum      : sum of models
    FFRooModelProd     : product of models

FFRooFit               : base fit class
  FFRooFitHist         : class for fitting histograms
  FFRooFitTree         : class for fitting trees
    FFRooSPlot         : class for sPlot fits of trees

FFRooFitter            : base high-level fit class
  FFRooFitterUnbinned  : class for high-level fitting of unbinned data
    FFRooFitterSPlot   : class for high-level sPlot fits of unbinned data
  FFRooFitterBinned    : class for high-level fitting of binned data
FFRooFitterSpecies     : class representing a fit species

FFFooFit               : namespace for utility methods