encoder.h

模式识别k_means聚类算法。

//encoder.
#include "fun.h"

template <class T>
class CEncoder
{
private:
	int m_VectorSize;
	int m_SeedsSum;
	T*  m_seeds;

public:
	CEncoder()
	{
		m_VectorSize = 0;
		m_SeedsSum = 0;
		m_seeds = NULL;
	}
	~CEncoder()
	{
		delete [] m_seeds;
	}

	void init(T* src, int dim, int sum);
	int seed_id( T* sample);
};


template <class T>
void CEncoder<T>::init(T* src, int dim, int sum)
{
	m_VectorSize = dim;
	m_SeedsSum   = sum;
	if (m_seeds)
	{
		delete [] m_seeds;
	}
	m_seeds = new T[ dim * sum];
	memcpy((void*)m_seeds, src, dim * sum * sizeof(T));
}

template <class T>
int CEncoder<T>::seed_id (T* sample)
{
	double distance , Min_dis;
	int id = 0;

	Min_dis = dis(m_seeds, sample, m_VectorSize);

	for (int i = 1 ;i < m_SeedsSum; i++)
	{
		distance = dis(&m_seeds[m_VectorSize * i], sample, m_VectorSize);
		if (distance < Min_dis)
		{
			Min_dis = distance;
			id = i;
		}
	}
	return id;
}