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Idiomatic record construction.

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Rob Rix 2016-08-09 11:06:27 -04:00
parent 638d8eda23
commit 8d1fb84ed3
1 changed files with 1 additions and 1 deletions
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src/Data/RandomWalkSimilarity.hs
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@ -96,7 +96,7 @@ decorateTermWithPQGram q = cata algebra
-- | Replaces bags of p,q-grams in a term’s annotations with corresponding feature vectors.
decorateTermWithFeatureVector :: (Hashable label, Prologue.Foldable f, Functor f) => Int -> Cofree f (Record (Gram label ': fields)) -> Cofree f (Record (Vector.Vector Double ': fields))
decorateTermWithFeatureVector d = cata $ \ (RCons gram rest :< functor) ->
cofree (RCons (foldr (Vector.zipWith (+) . getField . extract) (unitVector d (hash gram)) functor) rest :< functor)
cofree ((foldr (Vector.zipWith (+) . getField . extract) (unitVector d (hash gram)) functor .: rest) :< functor)
-- | Computes a unit vector of the specified dimension from a hash.
unitVector :: Int -> Int -> Vector.Vector Double