svm.h

来自「vc 2005下的libsvm2.8.4」· C头文件 代码 · 共 71 行

#ifndef _LIBSVM_H
#define _LIBSVM_H

#ifdef __cplusplus
extern "C" {
#endif

	struct svm_node
	{
		int index;
		double value;
	};

	struct svm_problem
	{
		int l;
		double *y;
		struct svm_node **x;
	};

	enum { C_SVC, NU_SVC, ONE_CLASS, EPSILON_SVR, NU_SVR };	/* svm_type */
	enum { LINEAR, POLY, RBF, SIGMOID, PRECOMPUTED }; /* kernel_type */

	struct svm_parameter
	{
		int svm_type;
		int kernel_type;
		int degree;	/* for poly */
		double gamma;	/* for poly/rbf/sigmoid */
		double coef0;	/* for poly/sigmoid */

		/* these are for training only */
		double cache_size; /* in MB */
		double eps;	/* stopping criteria */
		double C;	/* for C_SVC, EPSILON_SVR and NU_SVR */
		int nr_weight;		/* for C_SVC */
		int *weight_label;	/* for C_SVC */
		double* weight;		/* for C_SVC */
		double nu;	/* for NU_SVC, ONE_CLASS, and NU_SVR */
		double p;	/* for EPSILON_SVR */
		int shrinking;	/* use the shrinking heuristics */
		int probability; /* do probability estimates */
	};

	struct svm_model *svm_train(const struct svm_problem *prob, const struct svm_parameter *param);
	void svm_cross_validation(const struct svm_problem *prob, const struct svm_parameter *param, int nr_fold, double *target);

	int svm_save_model(const char *model_file_name, const struct svm_model *model);
	struct svm_model *svm_load_model(const char *model_file_name);

	int svm_get_svm_type(const struct svm_model *model);
	int svm_get_nr_class(const struct svm_model *model);
	void svm_get_labels(const struct svm_model *model, int *label);
	double svm_get_svr_probability(const struct svm_model *model);

	void svm_predict_values(const struct svm_model *model, const struct svm_node *x, double* dec_values);
	double svm_predict(const struct svm_model *model, const struct svm_node *x);
	double svm_predict_probability(const struct svm_model *model, const struct svm_node *x, double* prob_estimates);

	void svm_destroy_model(struct svm_model *model);
	void svm_destroy_param(struct svm_parameter *param);

	const char *svm_check_parameter(const struct svm_problem *prob, const struct svm_parameter *param);
	int svm_check_probability_model(const struct svm_model *model);

#ifdef __cplusplus
}
#endif

#endif /* _LIBSVM_H */