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#ifndef _WEIGHTS_H_
#define _WEIGHTS_H_
#include <string>
#include <vector>
#include "sparse_vector.h"
// warning: in the future this will become float
typedef double weight_t;
class Weights {
public:
static void InitFromFile(const std::string& fname,
std::vector<weight_t>* weights,
std::vector<std::string>* feature_list = NULL);
static void WriteToFile(const std::string& fname,
const std::vector<weight_t>& weights,
bool hide_zero_value_features = true,
const std::string* extra = NULL);
static void InitSparseVector(const std::vector<weight_t>& dv,
SparseVector<weight_t>* sv);
// check for infinities, NaNs, etc
static void SanityCheck(const std::vector<weight_t>& w);
// write weights with largest magnitude to cerr
static void ShowLargestFeatures(const std::vector<weight_t>& w);
static std::string GetString(const std::vector<weight_t>& w,
bool hide_zero_value_features = true);
// Assumes weights are already initialized for now
static void UpdateFromString(std::string& w_string,
std::vector<weight_t>& w);
private:
Weights();
};
#endif
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