Examples/Statistics/MinimumDecisionRule.cxx

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// Software Guide : BeginLatex
//
// \index{itk::Statistics::MinimumDecisionRule}
//
// The \code{Evaluate()} method of the \doxygen{MinimumDecisionRule}
// returns the index of the smallest discriminant score among the
// vector of discriminant scores that it receives as input.
//
// To begin this example, we include the class header file.  We also include
// the header file for the \code{std::vector} class that will be the
// container for the discriminant scores.
//
// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet
#include "itkMinimumDecisionRule.h"
#include <vector>
// Software Guide : EndCodeSnippet

int main(int, char*[])
{
  // Software Guide : BeginLatex
  //
  // The instantiation of the function is done through the usual
  // \code{New()} method and a smart pointer.
  //
  // Software Guide : EndLatex

  // Software Guide : BeginCodeSnippet
  typedef itk::Statistics::MinimumDecisionRule DecisionRuleType;
  DecisionRuleType::Pointer decisionRule = DecisionRuleType::New();
  // Software Guide : EndCodeSnippet


  // Software Guide : BeginLatex
  //
  // We create the discriminant score vector and fill it with three
  // values. The call \code{Evaluate( discriminantScores )} will return 0
  // because the first value is the smallest value.
  //
  // Software Guide : EndLatex

  // Software Guide : BeginCodeSnippet
  DecisionRuleType::MembershipVectorType discriminantScores;
  discriminantScores.push_back( 0.1 );
  discriminantScores.push_back( 0.3 );
  discriminantScores.push_back( 0.6 );

  std::cout << "MinimumDecisionRule: The index of the chosen = "
            << decisionRule->Evaluate( discriminantScores )
            << std::endl;
  // Software Guide : EndCodeSnippet

  return 0;
}