WikiExamples/Statistics/ListSample.cxx

#include "itkListSample.h"
#include "itkVector.h"

int main(int, char *[])
{
  using MeasurementVectorType = itk::Vector<float, 3>;
  using SampleType = itk::Statistics::ListSample<MeasurementVectorType>;
  SampleType::Pointer sample = SampleType::New();

  MeasurementVectorType mv;
  mv[0] = 1.0;
  mv[1] = 2.0;
  mv[2] = 4.0;

  sample->PushBack(mv);

  sample->Resize(3);

  mv[0] = 2.0;
  mv[1] = 4.0;
  mv[2] = 5.0;
  sample->SetMeasurementVector(1, mv);

  mv[0] = 3.0;
  mv[1] = 8.0;
  mv[2] = 6.0;
  sample->SetMeasurementVector(2, mv);

  for(unsigned long i = 0; i < sample->Size(); ++i)
    {
    std::cout << "id = " << i
              << "\t measurement vector = "
              << sample->GetMeasurementVector(i)
              << "\t frequency = "
              << sample->GetFrequency(i)
              << std::endl;
    }

  SampleType::Iterator iter = sample->Begin();

  while( iter != sample->End() )
    {
    std::cout << "id = " << iter.GetInstanceIdentifier()
              << "\t measurement vector = "
              << iter.GetMeasurementVector()
              << "\t frequency = "
              << iter.GetFrequency()
              << std::endl;
    ++iter;
    }

  std::cout << "Size = " << sample->Size() << std::endl;
  std::cout << "Total frequency = "
            << sample->GetTotalFrequency() << std::endl;
  
  return EXIT_SUCCESS;
}