ad-0.21: Automatic Differentiation

PortabilityGHC only
Stabilityexperimental
Maintainerekmett@gmail.com

Numeric.AD.Directed

Contents

Description

Allows the choice of AD Mode to be specified at the term level for benchmarking or more complicated usage patterns.

Synopsis

Gradients

grad :: (Traversable f, Num a) => Direction -> (forall s. Mode s => f (AD s a) -> AD s a) -> f a -> f aSource

grad' :: (Traversable f, Num a) => Direction -> (forall s. Mode s => f (AD s a) -> AD s a) -> f a -> (a, f a)Source

Jacobians

jacobian :: (Traversable f, Traversable g, Num a) => Direction -> (forall s. Mode s => f (AD s a) -> g (AD s a)) -> f a -> g (f a)Source

jacobian' :: (Traversable f, Traversable g, Num a) => Direction -> (forall s. Mode s => f (AD s a) -> g (AD s a)) -> f a -> g (a, f a)Source

Derivatives

diff :: Num a => Direction -> (forall s. Mode s => AD s a -> AD s a) -> a -> aSource

diff' :: Num a => Direction -> (forall s. Mode s => AD s a -> AD s a) -> a -> (a, a)Source

Exposed Types

class Lifted t => Mode t whereSource

Methods

lift :: Num a => a -> t aSource

Embed a constant

(<+>) :: Num a => t a -> t a -> t aSource

Vector sum

(*^) :: Num a => a -> t a -> t aSource

Scalar-vector multiplication

(^*) :: Num a => t a -> a -> t aSource

Vector-scalar multiplication

(^/) :: Fractional a => t a -> a -> t aSource

Scalar division

zero :: Num a => t aSource

 'zero' = 'lift' 0

Instances

newtype AD f a Source

AD serves as a common wrapper for different Mode instances, exposing a traditional numerical tower. Universal quantification is used to limit the actions in user code to machinery that will return the same answers under all AD modes, allowing us to use modes interchangeably as both the type level "brand" and dictionary, providing a common API.

Constructors

AD 

Fields

runAD :: f a
 

Instances

Primal f => Primal (AD f) 
Mode f => Mode (AD f) 
Lifted f => Lifted (AD f) 
Var (AD Reverse) 
Iso (f a) (AD f a) 
(Num a, Lifted f, Bounded a) => Bounded (AD f a) 
(Num a, Lifted f, Enum a) => Enum (AD f a) 
(Num a, Lifted f, Eq a) => Eq (AD f a) 
(Lifted f, Floating a) => Floating (AD f a) 
(Lifted f, Fractional a) => Fractional (AD f a) 
(Lifted f, Num a) => Num (AD f a) 
(Num a, Lifted f, Ord a) => Ord (AD f a) 
(Lifted f, Real a) => Real (AD f a) 
(Lifted f, RealFloat a) => RealFloat (AD f a) 
(Lifted f, RealFrac a) => RealFrac (AD f a) 
(Lifted f, Show a) => Show (AD f a)