classifier_test_util.hpp File Reference

#include <algorithm>
#include <cstdlib>
#include <cmath>
#include <cfloat>
#include <string>
#include <utility>
#include <vector>
#include "jubatus/util/math/random.h"

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Functions
std::pair< std::string, std::vector< double > >	gen_random_data (jubatus::util::math::random::mtrand &rand)
std::pair< std::string, std::vector< double > >	gen_random_data3 (jubatus::util::math::random::mtrand &rand)
void	make_random (jubatus::util::math::random::mtrand &rand, float mu, float sigma, size_t dim, std::vector< double > &v)
void	make_random (jubatus::util::math::random::mtrand &rand, const std::vector< float > &mus, float sigma, size_t dim, std::vector< double > &v)

Function Documentation

std::pair<std::string, std::vector<double> > gen_random_data

(

jubatus::util::math::random::mtrand &

rand

)

Definition at line 54 of file classifier_test_util.hpp.

References make_random().

                                       {
  const float mu_pos = 1.0;
  const float mu_neg = -1.0;
  const float sigma = 1.5;
  const size_t dim = 10;

  float mu;
  std::pair<std::string, std::vector<double> > p;
  if (rand() % 2 == 0) {
    p.first = "OK";
    mu = mu_pos;
  } else {
    p.first = "NG";
    mu = mu_neg;
  }
  make_random(rand, mu, sigma, dim, p.second);
  return p;
}

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std::pair<std::string, std::vector<double> > gen_random_data3

(

jubatus::util::math::random::mtrand &

rand

)

Definition at line 74 of file classifier_test_util.hpp.

References make_random().

                                       {
  const char* labels[] = { "1", "2", "3" };
  std::vector<float> mus;
  mus.push_back(3);
  mus.push_back(0);
  mus.push_back(-3);

  const float sigma = 1.0;
  const size_t dim = 10;

  std::pair<std::string, std::vector<double> > p;
  size_t l = rand() % 3;
  p.first = labels[l];
  std::rotate(mus.begin(), mus.begin() + l, mus.end());
  make_random(rand, mus, sigma, dim, p.second);
  return p;
}

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void make_random	(	jubatus::util::math::random::mtrand &	rand,
		float	mu,
		float	sigma,
		size_t	dim,
		std::vector< double > &	v
	)

Definition at line 30 of file classifier_test_util.hpp.

Referenced by gen_random_data(), and gen_random_data3().

                          {
  for (size_t i = 0; i < dim; i++) {
    float value = rand.next_gaussian(mu, sigma);
    v.push_back(value);
  }
}

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void make_random	(	jubatus::util::math::random::mtrand &	rand,
		const std::vector< float > &	mus,
		float	sigma,
		size_t	dim,
		std::vector< double > &	v
	)

Definition at line 42 of file classifier_test_util.hpp.

                          {
  for (size_t i = 0; i < dim; i++) {
    float value = rand.next_gaussian(mus[i % mus.size()], sigma);
    v.push_back(value);
  }
}