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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| | {{warning|1=The media wiki content on this page is no longer maintained.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 releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
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| ==MembershipSample.cxx==
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| <source lang="cpp">
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| #include "itkListSample.h"
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| #include "itkMembershipSample.h"
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| #include "itkVector.h"
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| int main(int, char *[])
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| {
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| typedef itk::Vector< float, 3 > MeasurementVectorType;
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| typedef itk::Statistics::ListSample< MeasurementVectorType > SampleType;
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| SampleType::Pointer sample = SampleType::New();
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| MeasurementVectorType mv;
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| mv[0] = 1.0;
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| mv[1] = 2.0;
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| mv[2] = 4.0;
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| sample->PushBack(mv);
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| mv[0] = 2.0;
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| mv[1] = 4.0; | |
| mv[2] = 5.0;
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| sample->PushBack(mv);
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| mv[0] = 3.0;
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| mv[1] = 8.0;
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| mv[2] = 6.0;
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| sample->PushBack(mv);
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| typedef itk::Statistics::MembershipSample< SampleType >
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| MembershipSampleType;
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| MembershipSampleType::Pointer membershipSample =
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| MembershipSampleType::New();
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| membershipSample->SetSample(sample);
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| membershipSample->SetNumberOfClasses(2);
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| membershipSample->AddInstance(0U, 0UL );
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| membershipSample->AddInstance(0U, 1UL );
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| membershipSample->AddInstance(1U, 2UL );
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| MembershipSampleType::ConstIterator iter = membershipSample->Begin();
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| while ( iter != membershipSample->End() )
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| {
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| std::cout << "instance identifier = " << iter.GetInstanceIdentifier()
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| << "\t measurement vector = "
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| << iter.GetMeasurementVector()
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| << "\t frequency = "
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| << iter.GetFrequency()
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| << "\t class label = "
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| << iter.GetClassLabel()
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| << std::endl;
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| ++iter;
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| }
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| MembershipSampleType::ClassSampleType::ConstPointer classSample =
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| membershipSample->GetClassSample( 0 );
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| MembershipSampleType::ClassSampleType::ConstIterator c_iter =
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| classSample->Begin();
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| while ( c_iter != classSample->End() )
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| {
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| std::cout << "instance identifier = " << c_iter.GetInstanceIdentifier()
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| << "\t measurement vector = "
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| << c_iter.GetMeasurementVector()
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| << "\t frequency = "
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| << c_iter.GetFrequency() << std::endl;
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| ++c_iter;
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| }
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| return EXIT_SUCCESS;
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| }
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| </source>
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| {{ITKCMakeLists|{{SUBPAGENAME}}}}
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