Data.CRF.Chain1.Constrained.Feature.Present

The module provides feature selection functions which extract features present in the dataset, i.e. features which directly occure the dataset.

You can mix functions defined here with the selection functions from the Data.CRF.Chain1.Constrained.Feature.Hidden module.

Documentation

presentFeats :: [(Xs, Ys)] -> [Feature]

Features of all kinds which occur in the dataset.

presentOFeats :: [(Xs, Ys)] -> [Feature]

OFeatures which occur in the dataset.

presentTFeats :: [(a, Ys)] -> [Feature]

TFeatures which occur in the dataset.

presentSFeats :: [(a, Ys)] -> [Feature]

SFeatures which occur in the dataset.