Esempi in C++ (Cpp) per rng_get_double

Esempio n. 1

File: ert_util_matrix.c Progetto: danielfmva/ert

void test_diag_std() {
  const int N = 25;
  double_vector_type * data = double_vector_alloc( 0,0);
  rng_type * rng = rng_alloc(MZRAN , INIT_DEV_URANDOM ); 
  matrix_type * m = matrix_alloc( N , N );
  double sum1 = 0;
  double sum2 = 0;
  int i;

  for (i=0; i < N; i++) {
    double R = rng_get_double( rng ); 
    matrix_iset(m , i , i , R);
    double_vector_iset( data , i , R );
    
    sum1 += R;
    sum2 += R*R;
  }
  {
    double mean = sum1 / N;
    double std = sqrt( sum2 / N - mean * mean );

    test_assert_double_equal( std , matrix_diag_std( m , mean ));
    test_assert_double_equal( statistics_std( data ) , matrix_diag_std( m , mean ));
    test_assert_double_equal( statistics_mean( data ) , mean );
  }
  matrix_free( m );
  rng_free( rng );
}

Esempio n. 2

File: matrix.c Progetto: YingfangZhou/ert

void matrix_random_init(matrix_type * matrix , rng_type * rng) {
  int i,j;
  for (j=0; j < matrix->columns; j++)
    for (i=0; i < matrix->rows; i++)
      matrix->data[ GET_INDEX(matrix , i , j) ] = rng_get_double( rng );
}