ad: Automatic Differentiation
Forward-, reverse- and mixed- mode automatic differentiation combinators with a common API.
Type-level "branding" is used to both prevent the end user from confusing infinitesimals and to limit unsafe access to the implementation details of each Mode.
Each mode has a separate module full of combinators.
Numeric.AD.Mode.Forward
provides basic forward-mode AD. It is good for computing simple derivatives.Numeric.AD.Mode.Reverse
uses benign side-effects to compute reverse-mode AD. It is good for computing gradients in one pass.Numeric.AD.Mode.Sparse
computes a sparse forward-mode AD tower. It is good for higher derivatives or large numbers of outputs.Numeric.AD.Mode.Tower
computes a dense forward-mode AD tower useful for higher derivatives of single input functions.Numeric.AD
computes using whichever mode or combination thereof is suitable to each individual combinator.
While not every mode can provide all operations, the following basic operations are supported, modified as appropriate by the suffixes below:
grad
computes the gradient (partial derivatives) of a function at a point.jacobian
computes the Jacobian matrix of a function at a point.diff
computes the derivative of a function at a point.du
computes a directional derivative of a function at a point.hessian
computes the Hessian matrix (matrix of second partial derivatives) of a function at a point.
The following suffixes alter the meanings of the functions above as follows:
'
-- also return the answerWith
lets the user supply a function to blend the input with the outputF
is a version of the base function lifted to return aTraversable
(orFunctor
) results
means the function returns all higher derivatives in a list or f-branchingStream
T
means the result is transposed with respect to the traditional formulation.0
means that the resulting derivative list is padded with 0s at the end.
Changes since 1.3:
Moved the contents of
Numeric.AD.Mode.Mixed
intoNumeric.AD
Split off
Numeric.AD.Variadic
for the variadic combinatorsRemoved the
UU
,FU
,UF
, andFF
type aliases.Stopped exporting the types for
Mode
andAD
from almost every module. ImportNumeric.AD.Types
if necessary.Renamed
Tensors
toJet
Dependency bump to be compatible with ghc 7.4.1 and mtl 2.1
More aggressive zero tracking.
diff (**n) 0
for constant n anddiff (0**)
both now yield the correct answer for all modes.
Modules
[Index]
Downloads
- ad-1.5.0.1.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
- No Candidates
Versions [RSS] | 0.12, 0.13, 0.15, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.27, 0.28, 0.30.0, 0.31.0, 0.32.0, 0.33.0, 0.40, 0.40.1, 0.44.0, 0.44.1, 0.44.2, 0.44.3, 0.44.4, 0.45.0, 0.46.0, 0.46.1, 0.46.2, 0.47.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.1.0, 1.1.0.1, 1.1.1, 1.1.3, 1.2.0, 1.2.0.1, 1.2.0.2, 1.3, 1.3.0.1, 1.3.1, 1.4, 1.5, 1.5.0.1, 1.5.0.2, 3.0, 3.0.1, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.2, 3.2.1, 3.2.2, 3.3.0.1, 3.3.1, 3.3.1.1, 3.4, 4.0, 4.0.0.1, 4.1, 4.2, 4.2.0.1, 4.2.1, 4.2.1.1, 4.2.2, 4.2.3, 4.2.4, 4.3, 4.3.1, 4.3.2, 4.3.2.1, 4.3.3, 4.3.4, 4.3.5, 4.3.6, 4.4, 4.4.1, 4.5, 4.5.1, 4.5.2, 4.5.3, 4.5.4, 4.5.5, 4.5.6 |
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Dependencies | array (>=0.2 && <0.5), base (>=4 && <5), comonad (>=1.1.1.5 && <1.2), containers (>=0.2 && <0.6), data-reify (>=0.6 && <0.7), free (>=2.1.1 && <2.2), template-haskell (>=2.6 && <2.8) [details] |
License | BSD-3-Clause |
Copyright | (c) Edward Kmett 2010-2012, (c) Barak Pearlmutter and Jeffrey Mark Siskind 2008-2009 |
Author | Edward Kmett |
Maintainer | ekmett@gmail.com |
Category | Math |
Home page | http://github.com/ekmett/ad |
Source repo | head: git clone git://github.com/ekmett/ad.git |
Uploaded | by EdwardKmett at 2012-05-10T16:21:11Z |
Distributions | LTSHaskell:4.5.6, NixOS:4.5.6, Stackage:4.5.6 |
Reverse Dependencies | 24 direct, 26 indirect [details] |
Downloads | 84271 total (324 in the last 30 days) |
Rating | 2.5 (votes: 4) [estimated by Bayesian average] |
Your Rating | |
Status | Docs uploaded by user Build status unknown [no reports yet] |