polar_normal_weights_wrapper< T > Class Template Reference

Static Public Member Functions
static void	func (weight &w, uint64_t index)

Detailed Description

template<class T>
class polar_normal_weights_wrapper< T >

Definition at line 52 of file parse_regressor.cc.

Member Function Documentation

func()

template<class T >

static void polar_normal_weights_wrapper< T >::func ( weight &  w, uint64_t  index  )

inlinestatic

Definition at line 55 of file parse_regressor.cc.

References f, and merand48().

  {
    static float x1 = 0.0;
    static float x2 = 0.0;
    static float temp = 0.0;
    do
    {
      x1 = 2.0f * merand48(index) - 1.0f;
      x2 = 2.0f * merand48(index) - 1.0f;
      temp = x1 * x1 + x2 * x2;
    } while ((temp >= 1.0) || (temp == 0.0));
    temp = sqrtf((-2.0f * logf(temp)) / temp);
    w = x1 * temp;
  }

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The documentation for this class was generated from the following file:

• /mnt/c/w/linux/vowpal_wabbit/vowpalwabbit/parse_regressor.cc