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Adding of a function to obtain MC indices array and a parents tuples … #112

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Adding of a function to obtain MC indices array and a parents tuples …
Oct 22, 2021
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18 changes: 18 additions & 0 deletions analyzers/dataframe/MCParticle.cc
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Expand Up @@ -426,6 +426,13 @@ ROOT::VecOps::RVec<int> MCParticle::get_parentid(ROOT::VecOps::RVec<int> mcind,
return result;
}

ROOT::VecOps::RVec<int> get_index(ROOT::VecOps::RVec<edm4hep::MCParticleData> mc){

@clementhelsens clementhelsens Feb 23, 2022

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I do not see the point of this function, it just return the list of indices of the collection. The result will always be a vector of int between 0 and size-1. Why is that needed?

@Tristan63170 Tristan63170 Feb 23, 2022

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It was needed to be able to use the MCParticle::get_parentid() method directly on the MC sample (the list of indices is an input of this method).

@clementhelsens clementhelsens Feb 23, 2022

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yes, I understand that but I think this is something that could go in the define directly, After checking with RDF experts, seems something like this should be the most efficient way:

df.Define("idxs", "RVecI v(sz); std::iota(...); return v;")

@Tristan63170 Tristan63170 Feb 23, 2022

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Ok I see, interesting , it is another way to do that directly in the analysis.py script.

@clementhelsens clementhelsens Feb 23, 2022

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could you check it does work the same and remove the corresponding C++ code ?

@Tristan63170 Tristan63170 Feb 23, 2022

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I will check that later.

@Tristan63170 Tristan63170 Mar 3, 2022

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It's removed.

@Tristan63170 Tristan63170 May 3, 2022

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When I try to use std::iota in the analysis.py, the following error occurred:

input_line_101:2:108: error: no matching function for call to 'iota'
auto lambda21 = [](ROOT::VecOps::RVecedm4hep::MCParticleData& var0){ROOT::RVecI list_index(var0.size()); std::iota(list_index,list_index+list_index.size(),0); return list_index;
^~~~~~~~~
/cvmfs/sw.hsf.org/contrib/gcc/11.2.0/x86_64-centos7-gcc8.3.0-opt/d3epy/lib/gcc/x86_64-pc-linux-gnu/11.2.0/../../../../include/c++/11.2.0/bits/stl_numeric.h:88:5: note: candidate template ignored: deduced conflicting types for parameter '_ForwardIterator' ('RVec' vs. 'RVec')
iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value)
^
python3: /tmp/gitlab-runner/spack-stage/spack-stage-root-6.26.02-oqvm2mao7vull7th2vj4tmyo3i4jqsdp/spack-src/interpreter/llvm/src/tools/clang/lib/AST/DeclCXX.cpp:1391: clang::CXXMethodDecl* clang::CXXRecordDecl::getLambdaCallOperator() const: Assertion !Calls.empty() && "Missing lambda call operator!"' failed. *** Break *** abort ^Cinput_line_102:2:108: error: no matching function for call to 'iota' auto lambda21 = [](ROOT::VecOps::RVec<edm4hep::MCParticleData>& var0){ROOT::RVecI list_index(var0.size()); std::iota(list_index,list_index+list_index.size(),0); return list_index; ^~~~~~~~~ /cvmfs/sw.hsf.org/contrib/gcc/11.2.0/x86_64-centos7-gcc8.3.0-opt/d3epy/lib/gcc/x86_64-pc-linux-gnu/11.2.0/../../../../include/c++/11.2.0/bits/stl_numeric.h:88:5: note: candidate template ignored: deduced conflicting types for parameter '_ForwardIterator' ('RVec<int>' vs. 'RVec<unsigned long>') iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value) ^ python3: /tmp/gitlab-runner/spack-stage/spack-stage-root-6.26.02-oqvm2mao7vull7th2vj4tmyo3i4jqsdp/spack-src/interpreter/llvm/src/tools/clang/lib/AST/DeclCXX.cpp:1391: clang::CXXMethodDecl* clang::CXXRecordDecl::getLambdaCallOperator() const: Assertion !Calls.empty() && "Missing lambda call operator!"' failed.
*** Break *** abort

I have certainly something wrong but I don't understand what, have you any idea ?

thanks

ROOT::VecOps::RVec<int> result;
for (size_t i = 0; i < mc.size(); ++i) {
result.push_back(i);
}
return result;
}

// ----------------------------------------------------------------------------------------------------------------------------------

Expand Down Expand Up @@ -676,9 +683,20 @@ ROOT::VecOps::RVec<float> MCParticle::AngleBetweenTwoMCParticles( ROOT::VecOps::
}

return result;
}

ROOT::VecOps::RVec<edm4hep::MCParticleData> MCParticle::get_subMC(ROOT::VecOps::RVec<int> index, ROOT::VecOps::RVec<edm4hep::MCParticleData> in){
ROOT::VecOps::RVec<edm4hep::MCParticleData> result;
for (size_t i = 0; i < index.size(); ++i) {
if (index[i]>-1)
result.push_back(in.at(index[i]));
//else
// std::cout << "electron index negative " << index[i]<<std::endl;
}
return result;
}





7 changes: 6 additions & 1 deletion analyzers/dataframe/MCParticle.h
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Expand Up @@ -49,6 +49,8 @@ namespace MCParticle{
bool m_chargeconjugate = true;
ROOT::VecOps::RVec<edm4hep::MCParticleData> operator() (ROOT::VecOps::RVec<edm4hep::MCParticleData> in);
};

@clementhelsens clementhelsens Feb 23, 2022

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remove 2 spaces



/// get MC history tree for a given MCParticle index
struct get_tree{
Expand Down Expand Up @@ -91,6 +93,8 @@ namespace MCParticle{
ROOT::VecOps::RVec<edm4hep::MCParticleData> in ,
ROOT::VecOps::RVec<int> ind);

/// return indices of MC particles
ROOT::VecOps::RVec<int> get_index(ROOT::VecOps::RVec<edm4hep::MCParticleData> mc);

/// return the parent index of a given list of MC particles
ROOT::VecOps::RVec<int> get_parentid(ROOT::VecOps::RVec<int> mcind, ROOT::VecOps::RVec<edm4hep::MCParticleData> mc, ROOT::VecOps::RVec<int> parents);
Expand Down Expand Up @@ -200,7 +204,8 @@ namespace MCParticle{
ROOT::VecOps::RVec<edm4hep::MCParticleData> in,
ROOT::VecOps::RVec<int> ind) ;


/// return a sub list of MCParticles from a given list of indices
ROOT::VecOps::RVec<edm4hep::MCParticleData> get_subMC(ROOT::VecOps::RVec<int> index, ROOT::VecOps::RVec<edm4hep::MCParticleData> in);


}
Expand Down