globals.h

支持向量机(SVM)的VC源代码

#ifndef globals_h
#define globals_h 1



#define use_time 1
// uncomment the following line if you get problems with sys/times.h when compiling:
#undef use_time



#ifdef use_time
#include <sys/times.h>
#endif

#include <string.h>
#include <math.h>
#include <iostream.h>


/**
 * Global declarations
 *
 * Declares
 * @li Variable types
 *
 * @author Stefan Rueping <[e-mail]>
 * @version 0.1
 **/


// variable types
typedef long SVMINT;
typedef double SVMFLOAT;

// constants
#define MAXSVMINT 2147483647
#define infinity 1e20
#define MAXCHAR 10000



typedef struct svm_attrib{
  SVMFLOAT att;
  SVMINT index;
} SVM_ATTRIB1;

typedef struct svm_example{
  SVMINT length;
  svm_attrib* example;
  SVMFLOAT y;
  SVMFLOAT alpha;
} SVM_EXAMPLE1;

typedef struct svm_result {
  SVMFLOAT VCdim;
  SVMFLOAT loss;
  SVMFLOAT accuracy;
  SVMFLOAT precision;
  SVMFLOAT recall;
  SVMFLOAT MAE;
  SVMFLOAT MSE;
  // for the asymmetrical case
  SVMFLOAT loss_pos;
  SVMFLOAT loss_neg;
  // loo predictors
  SVMFLOAT pred_loss;
  SVMFLOAT pred_accuracy;
  SVMFLOAT pred_precision;
  SVMFLOAT pred_recall;
  // count of the support vectors
  SVMINT number_svs;
  SVMINT number_bsv;
} SVM_RESULT1;

typedef struct quadratic_program {
  SVMINT    n;   /* number of variables */
  SVMINT    m;   /* number of linear equality constraints */
  SVMFLOAT* c;   
  SVMFLOAT* H;   /* c' * x + 1/2 x' * H * x -> min */
  SVMFLOAT* A;   
  SVMFLOAT* b;   /* A * x = b */
  SVMFLOAT* l;   
  SVMFLOAT* u;   /* l <= x <= u */
} QUADRATIC_PROGRAM1;


class example_format{
 public:
  // format of examples file
  int sparse;
  int where_x;
  int where_y ;
  int where_alpha;
  char delimiter;
};

ostream& operator<< (ostream& data_stream, example_format& format);


// exceptions 
class general_exception{
 public:
  char* error_msg;
  general_exception();
  general_exception(char* the_error);
};

class read_exception : public general_exception{
 public:
  read_exception();
  read_exception(char* the_error);
};

class no_number_exception : public general_exception{};

class input_exception : public general_exception{};

// little helpers
#define abs(x) ((x) >= 0 ? (x) : -(x))



SVMFLOAT string2svmfloat(char* s);

long get_time();

#endif