iris_bayes.cpp

贝叶斯分类器的C++源码

#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <cmath>

using namespace std;

// *****************************************************
// Constants and Type Definitions
// *****************************************************

#define	ClassNum			3
#define	FeatureVectorSize	4
#define	SampleNum			150

typedef struct iris_sample_type {
	char	label[16];
	int		id;
	int		fv[FeatureVectorSize];
} IRISSample;

// *****************************************************
// Function Prototypes
// *****************************************************

static void load_iris_data();
static void leave_one_out_test();
static void estimate();
static void estimate_mean_vector();
static void estimate_covariance_matrix();
static void estimate_mean_vector_for_iris_leave_one_out(int ci, int idx1, int idx2, int leave);
static void estimate_covariance_matrix_for_iris_leave_one_out(int ci, int idx1, int idx2, int leave);
static void bayes_classifier(int idx, char label[16]);
static void output_iris_parameter();
static void inverse(double s[4][4], double I[4][4]);
static void determinant(double s[4][4], double& det);

// *****************************************************
// Global Data
// *****************************************************

// 妓セ疭紉畐
static IRISSample iris[SampleNum];

// 参璸把计
static double m[ClassNum][FeatureVectorSize];
static double C[ClassNum][FeatureVectorSize][FeatureVectorSize];

// CI: C