VanyaBelyaev

import ROOT, math

print ( 'ROOT version %s' % ROOT.gROOT.GetVersion() )

ROOT.gInterpreter.Declare('''
#include "RooAbsPdf.h"

class PyPdf  : public RooAbsPdf
{
public:

VanyaBelyaev

import ROOT, array

print ( 'ROOT version', ROOT.gROOT.GetVersion() )

x       = ROOT.RooRealVar('x','x-variable' , 0 , 10 )
varset  = ROOT.RooArgSet() ; varset.add ( x )
m0      = ROOT.RooFit.RooConst  ( 5 )
s0      = ROOT.RooFit.RooConst  ( 1 )

## generate data 

VanyaBelyaev

ROOT version 6.27/01
(0.8357307706942926+0.5491393984360653j)
         840456 function calls (839750 primitive calls) in 34.002 seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.000    0.000 :0(AddCPPInstancePickling)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryGetAttrPyz)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryWritePyz)

VanyaBelyaev

ROOT version 6.27/01
(0.8357307706942926+0.5491393984360653j)
         840456 function calls (839750 primitive calls) in 34.003 seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.000    0.000 :0(AddCPPInstancePickling)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryGetAttrPyz)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryWritePyz)

VanyaBelyaev

ROOT version 6.26/04
(0.8357307706942926+0.5491393984360653j)
         838190 function calls (837529 primitive calls) in 6.539 seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.000    0.000 :0(AddCPPInstancePickling)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryGetAttrPyz)
        1    0.000    0.000    0.000    0.000 :0(AddDirectoryWritePyz)

VanyaBelyaev

import ROOT
ROOT.gInterpreter.Declare("""
#include <complex>
#include <cmath>
namespace Test {
 double               myfun ( const double               a ) { return a ; }
 std::complex<double> myfun ( const std::complex<double> a ) { return a ; }
}
""")
print  ('ROOT version', ROOT.gROOT.GetVersion() ) 

VanyaBelyaev

import ROOT
ROOT.gInterpreter.Declare("""
#include <complex>
#include <cmath>
namespace Test {
 double               myfun ( const double               a ) { return a ; }
 std::complex<double> myfun ( const std::complex<double> a ) { return a ; }
}
""")

VanyaBelyaev

import ROOT, random

## 1) create Gaussian fit models
xvar  = ROOT.RooRealVar( 'x'     , 'x-observable'             , 0 ,    10 )
mean  = ROOT.RooRealVar( 'mean'  , 'mean-value for Gaussian'  , 5 , 2 , 8 )
sigma = ROOT.RooRealVar( 'sigma' , 'sigma-value for Gaussian' , 1 , 0.5 , 2.0 )

gauss = ROOT.RooGaussian( 'G' , 'Gaussian model' , xvar , mean , sigma ) 

## 2) create and fill dataste & histogram

VanyaBelyaev

#!/bin/bash 

## 1.  setup environment 

## SUCCESS

## source /cvmfs/sft.cern.ch/lcg/views/LCG_97a/x86_64-centos7-gcc9-opt/setup.sh 
## source /cvmfs/sft.cern.ch/lcg/views/LCG_97/x86_64-centos7-gcc9-opt/setup.sh
## source /cvmfs/sft.cern.ch/lcg/views/LCG_96b/x86_64-centos7-gcc9-opt/setup.sh
## source /cvmfs/sft.cern.ch/lcg/views/LCG_96a/x86_64-centos7-gcc8-opt/setup.sh

VanyaBelyaev

from __future__ import print_function
import ROOT

ROOT.gROOT.ProcessLine('''
#include <string>
#include <iostream>

class A
{
public: