Numeric.Erf

Documentation

class Floating a => Erf a where

Error function related functions.

The derivative of erf is x -> 2 / sqrt pi * exp (x^2), and this uniquely determines erf by erf 0 = 0.

Minimal complete definition is erfc or normcdf.

Methods

erf :: a -> a

erfc

Arguments

:: a

-> a

erfc x = 1 - erf x

erfcx

Arguments

:: a

-> a

erfcx x = exp (x*x) * erfc x

normcdf

Arguments

:: a

-> a

normcdf x = erfc(-x  sqrt 2)  2

Instances

Erf Double

Defined in Data.Number.Erf

Methods

erf :: Double -> Double

erfc :: Double -> Double

erfcx :: Double -> Double

normcdf :: Double -> Double

Erf Float

Defined in Data.Number.Erf

Methods

erf :: Float -> Float

erfc :: Float -> Float

erfcx :: Float -> Float

normcdf :: Float -> Float