crf-chain1-constrained: First-order, constrained, linear-chain conditional random fields

[ bsd3, library, math ] [ Propose Tags ]

The library provides efficient implementation of the first-order, linear-chain conditional random fields (CRFs) with position-wise constraints imposed over label values.

It is strongly related to the simpler http://hackage.haskell.org/package/crf-chain1 library where constraints are not taken into account and all features which are not included in the CRF model are considered to have probability of 0. Here, on the other hand, such features do not influence the overall probability of the (sentence, labels) pair - they are assigned the default potential of 0.

Efficient algorithm for determining marginal probabilities of individual labels is provided. The tagging is performed with respect to marginal probabilities.

Versions 0.1.0, 0.1.1, 0.1.2, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.3.2, 0.4.0, 0.5.0
Dependencies array, base (==4.*), binary, containers, data-lens, logfloat, monad-codec (==0.2.*), parallel, random, sgd (>=0.2.1 && <0.3), vector, vector-binary [details]
License BSD-3-Clause
Copyright Copyright (c) 2012 IPI PAN
Author Jakub Waszczuk
Maintainer waszczuk.kuba@gmail.com
Category Math
Home page https://github.com/kawu/crf-chain1-constrained
Source repo head: git clone git://github.com/kawu/crf-chain1-constrained.git
Uploaded by JakubWaszczuk at Sat Oct 27 13:43:23 UTC 2012
Distributions NixOS:0.5.0
Downloads 3190 total (117 in the last 30 days)
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Status Docs uploaded by user
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