Class with TVectorD members

ROOT
1

Dear Experts,

We are trying to make a class that owns TVectorD, TMatrixD, std::vector, std::vector and as soon as we try to access these obejct in member function we hit SegFault or similar problem. It seems that the size of the object is not known.
What is the proper way of using these class as member?

You can find a minimal example below:

HEADER FILE

#ifndef Test_HH_
#define Test_HH_
#include "TVectorD.h"

  class Test
  {
  public:
    Test();
    void Print();

  private:
    TVectorD fV;
  protected:
  };

#endif//~Test_HH_

.CC FILE

#include "Test.hh" 
#include <iostream>

  //###### Constructor ######
  Test::Test()
  {
    std::cout<<"file: "<<__FILE__<<" at line: "<<__LINE__<<std::endl;
    fV = TVectorD(5);
    fV.Print();
    std::cout<<"file: "<<__FILE__<<" at line: "<<__LINE__<<std::endl;
    fV(0) = 10;
    std::cout<<"file: "<<__FILE__<<" at line: "<<__LINE__<<std::endl;
    Print();
  }

  void Test::Print()
  {
    fV.Print();
    std::cout<<"file: "<<__FILE__<<" at line: "<<__LINE__<<" "<< fV(0)<<std::endl;

  }

And when we simply create a Test object in a main file we get:

ile: /astro/users/lpetit/Analysis/toybeamline/src/Test.cc at line: 7
Error in <UnknownClass::operator=(const TVectorT<Element> &)>: vectors not compatible

Vector (0)  is as follows

     |        1  |
------------------

file: /astro/users/lpetit/Analysis/toybeamline/src/Test.cc at line: 10
Error in <TVectorT<double>::operator()>: Request index(0) outside vector range of 0 - 0
file: /astro/users/lpetit/Analysis/toybeamline/src/Test.cc at line: 12

Vector (0)  is as follows

     |        1  |
------------------

Error in <TVectorT<double>::operator()>: Request index(0) outside vector range of 0 - 0
file: /astro/users/lpetit/Analysis/toybeamline/src/Test.cc at line: 19 10

Please read tips for efficient and successful posting and posting code

ROOT Version: v6.20.04
Platform: SL7
Compiler: gcc4.8.5

2

fV.ResizeTo(5); fV = TVectorD(5);

3

Thanks for the reply. In the meantime I found the SVector class which seems more appropriate to what we need to do.

4

“SVector” / “SMatrix” are unrelated to “TVector” / “TMatrix”.

5

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.