math

Documentation

Index

• type Gaussian2d
  • func NewGaussian2d(mx, my, sx, sy, ht, cov float64) *Gaussian2d
  • func (g *Gaussian2d) PDF(x, y float64) float64
  • func (g *Gaussian2d) Precompute()

Types

type Gaussian2d

type Gaussian2d struct {
	Mx, My float64 // mean
	Sx, Sy float64 // standard deviation
	Cov    float64 // covariance
	Ht     float64 // value at the mean
	// contains filtered or unexported fields
}

Gaussian2d is a 2-dimensional normal distribution.

func NewGaussian2d

func NewGaussian2d(mx, my, sx, sy, ht, cov float64) *Gaussian2d

NewGaussian2d returns a new 2-dimensional Gaussian2d with the given mean, standard deviation, covariance

A bunch of values used during PDF computation are pre-computed for efficiency, so if any of the exported fields are changed then Precompute() must be called to re-compute these fields.

func (*Gaussian2d) PDF

func (g *Gaussian2d) PDF(x, y float64) float64

PDF returns the probability density.

func (*Gaussian2d) Precompute

func (g *Gaussian2d) Precompute()

precompute pre-computes a bunch of information that is used during PDF computation. It must be called if any of the exported fields of the gaussion are changed after NewGaussian2d is called.