probability-0.2.1: Probabilistic Functional Programming Source code Contents Index

Numeric.Probability.Random

Contents random generator random distribution Randomized changes Randomized transitions

Description

Randomized values

Synopsis

newtype T a = Cons { decons :: State StdGen a } randomR :: Random a => (a, a) -> T a run :: T a -> IO a runSeed :: StdGen -> T a -> a print :: Show a => T a -> IO () pick :: (Num prob, Ord prob, Random prob) => T prob a -> T a type Distribution prob a = T (T prob a) above :: (Num prob, Ord prob, Ord a) => prob -> Distribution prob a -> Distribution prob (Select a) dist :: (Fractional prob, Ord a) => [T a] -> Distribution prob a type Change a = a -> T a change :: (Num prob, Ord prob, Random prob) => T prob a -> Change a type Transition prob a = a -> Distribution prob a type ApproxDist a = T [a]

random generator

newtype T a Source

Random values Constructors Cons decons :: State StdGen a Instances Monad T Functor T C T C Double T

randomR :: Random a => (a, a) -> T a Source

run :: T a -> IO a Source

Run random action in IO monad.

runSeed :: StdGen -> T a -> a Source

Run random action without IO using a seed.

print :: Show a => T a -> IO () Source

pick :: (Num prob, Ord prob, Random prob) => T prob a -> T a Source

random distribution

type Distribution prob a = T (T prob a) Source

Randomized distribution

above :: (Num prob, Ord prob, Ord a) => prob -> Distribution prob a -> Distribution prob (Select a) Source

dist :: (Fractional prob, Ord a) => [T a] -> Distribution prob a Source

dist converts a list of randomly generated values into a distribution by taking equal weights for all values

Randomized changes

type Change a = a -> T a Source

random change

change :: (Num prob, Ord prob, Random prob) => T prob a -> Change a Source

Randomized transitions

type Transition prob a = a -> Distribution prob a Source

random transition

type ApproxDist a = T [a] Source

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