PrincipalComponentAnalysis.h

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#ifndef PrincipalComponentAnalysis_h
#define PrincipalComponentAnalysis_h

#include <vector>
#include "tnt/tnt_array2d.h"
#include "MultivariateStatistics.h"
#include "IException.h"
#include "Constants.h"

namespace Isis {
  class PrincipalComponentAnalysis {
    public:
      PrincipalComponentAnalysis(const int n);
      PrincipalComponentAnalysis(TNT::Array2D<double> transform);
      ~PrincipalComponentAnalysis() {};
      void AddData(const double *data, const unsigned int count);
      void ComputeTransform();
      TNT::Array2D<double> Transform(TNT::Array2D<double> data);
      TNT::Array2D<double> Inverse(TNT::Array2D<double> data);
      TNT::Array2D<double> TransformMatrix() {
        return p_transform;
      };
      int Dimensions() {
        return p_dimensions;
      };

    private:
      void ComputeInverse();
      bool p_hasTransform;
      int p_dimensions;

      TNT::Array2D<double> p_transform, p_inverse;
      std::vector<Isis::MultivariateStatistics *> p_statistics;
  };
}

#endif