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

[ bsd3, library, math ] [ Propose Tags ]
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
Dependencies array, base (==4.*), binary, containers, data‑lens, logfloat (>=0.12.1 && <0.14), monad‑codec (==0.2.*), parallel, random, sgd (>=0.3.2 && <0.4), vector, vector‑binary, vector‑th‑unbox (>=0.2.1 && <0.3) [details]
License BSD-3-Clause
Copyright Copyright (c) 2012 IPI PAN
Author Jakub Waszczuk
Category Math
Home page
Source repo head: git clone git://
Uploaded by JakubWaszczuk at Mon Feb 23 11:35:59 UTC 2015
Distributions NixOS:0.3.2
Downloads 2900 total (26 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2015-02-23 [all 1 reports]
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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 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.




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