ITK/Examples/Statistics/MembershipSample: Difference between revisions

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A MembershipSample is a list ListSample with an additional attribute indicating which class the sample belongs to. This is the output type in many of the clustering and segmentation algorithms in the Statistics framework.
{{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/*  pages likely require ITK version 4.13 or earlier releasesIn many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}}
 
==MembershipSample.cxx==
<source lang="cpp">
#include "itkListSample.h"
#include "itkMembershipSample.h"
#include "itkVector.h"
 
int main(int, char *[])
{
  typedef itk::Vector< float, 3 > MeasurementVectorType;
  typedef itk::Statistics::ListSample< MeasurementVectorType > SampleType;
  SampleType::Pointer sample = SampleType::New();
  MeasurementVectorType mv;
 
  mv[0] = 1.0;
  mv[1] = 2.0;
  mv[2] = 4.0;
  sample->PushBack(mv);
 
  mv[0] = 2.0;
   mv[1] = 4.0;
  mv[2] = 5.0;
  sample->PushBack(mv);
 
  mv[0] = 3.0;
  mv[1] = 8.0;
  mv[2] = 6.0;
  sample->PushBack(mv);
  typedef itk::Statistics::MembershipSample< SampleType >
    MembershipSampleType;
 
  MembershipSampleType::Pointer membershipSample =
    MembershipSampleType::New();
 
  membershipSample->SetSample(sample);
  membershipSample->SetNumberOfClasses(2);
 
  membershipSample->AddInstance(0U, 0UL );
  membershipSample->AddInstance(0U, 1UL );
  membershipSample->AddInstance(1U, 2UL );
 
  MembershipSampleType::ConstIterator iter = membershipSample->Begin();
  while ( iter != membershipSample->End() )
    {
    std::cout << "instance identifier = " << iter.GetInstanceIdentifier()
              << "\t measurement vector = "
              << iter.GetMeasurementVector()
              << "\t frequency = "
              << iter.GetFrequency()
              << "\t class label = "
              << iter.GetClassLabel()
              << std::endl;
    ++iter;
    }
 
 
  MembershipSampleType::ClassSampleType::ConstPointer classSample =
    membershipSample->GetClassSample( 0 );
 
  MembershipSampleType::ClassSampleType::ConstIterator c_iter =
    classSample->Begin();
 
  while ( c_iter != classSample->End() )
    {
    std::cout << "instance identifier = " << c_iter.GetInstanceIdentifier()
              << "\t measurement vector = "
              << c_iter.GetMeasurementVector()
              << "\t frequency = "
              << c_iter.GetFrequency() << std::endl;
    ++c_iter;
    }
 
  return EXIT_SUCCESS;
}
</source>
 
 
{{ITKCMakeLists|{{SUBPAGENAME}}}}

Latest revision as of 21:46, 6 June 2019

Warning: The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.