MultivariateStatistics.h

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#ifndef MultivariateStatistics_h
#define MultivariateStatistics_h

#include "Statistics.h"
#include "SpecialPixel.h"
#include "Constants.h"

namespace Isis {
  class MultivariateStatistics {
    public:
      MultivariateStatistics();
      ~MultivariateStatistics();

      void Reset();
      void AddData(const double *x, const double *y,
                   const unsigned int count);
      void AddData(double x, double y, unsigned int count = 1);
      void RemoveData(const double *x, const double *y,
                      const unsigned int count);

      Isis::Statistics X() const;
      Isis::Statistics Y() const;
      double SumXY() const;
      double Covariance() const;
      double Correlation() const;

      void LinearRegression(double &a, double &b) const;

      BigInt ValidPixels() const;
      BigInt InvalidPixels() const;
      BigInt TotalPixels() const;

    private:
      Isis::Statistics p_x;
      Isis::Statistics p_y;

      double p_sumxy;
      BigInt p_validPixels;
      BigInt p_invalidPixels;
      BigInt p_totalPixels;
  };
};

#endif