logreg.hpp

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#ifndef LOGREG_hpp
#define LOGREG_hpp
 
#include <string>
#include <vector>
 
namespace gpmp {
 
namespace ml {
 
class LogReg {
  public:
    LogReg(double l_rate = 001, int num_iters = 1000, double lda = 001);
 
    ~LogReg();
 
    void train(const std::vector<std::vector<double>> &X_train,
               const std::vector<int> &y_train);
 
    std::vector<int> classify(const std::vector<std::vector<double>> &X);
 
    std::vector<double> predict(const std::vector<std::vector<double>> &X_test);
 
    double accuracy(const std::vector<std::vector<double>> &X_test,
                    const std::vector<int> &y_test);
 
    void feature_scaling(std::vector<std::vector<double>> &X);
 
    double learning_rate; 
    int num_iterations;   
    double lambda;        
    std::vector<double>
        weights; 
    double sigmoid(double z);
 
    double cost_function(const std::vector<std::vector<double>> &X,
                         const std::vector<int> &y);
};
 
} // namespace ml
 
} // namespace gpmp
#endif