accuracy can work on probablity distributions now

src/GEval/Common.hs

@@ -38,3 +38,7 @@ sepByWhitespaces parser = possibleWhitespace *> parser `sepBy` whitespace <* pos
 possibleWhitespace = many' (satisfy isHorizontalSpace)
 
 whitespace = many1 (satisfy isHorizontalSpace)
+
+indicator :: Bool -> Double
+indicator True = 1.0
+indicator False = 0.0

src/GEval/Core.hs

@@ -369,8 +369,17 @@ gevalCore' BLEU _ = gevalCoreWithoutInput (Right . Prelude.map Prelude.words . D
           | otherwise = exp (1.0 - (r /. c))
 
 gevalCore' Accuracy _ = gevalCoreWithoutInput (Right . strip) (Right . strip) hitOrMiss averageC id
-                      where hitOrMiss (exp,got) = if (normalizeProbForAccuracy exp got) == exp then 1.0 else 0.0
+                      where hitOrMiss (exp, got) =
-                            -- if the expected value is 0 or 1 treat values between 0.0 and 1.0 as probabilities
+                              -- first try to parse what we got as a probability distribution
+                              -- (like the one used for Likelikehood/LogLossHashed metric)
+                              case parseWordSpecs got of
+                                Right wordSpecs -> if Prelude.null pairs
+                                                   then 0.0
+                                                   else indicator (exp == (snd $ Prelude.maximum pairs))
+                                                 where pairs = catMaybes $ Prelude.map wordSpecToPair wordSpecs
+                                Left _ ->  indicator ((normalizeProbForAccuracy exp got) == exp)
+                                          -- if the expected value is 0 or 1 treat values
+                                          -- between 0.0 and 1.0 as probabilities
                                           -- for the positive outcome
                             normalizeProbForAccuracy :: Text -> Text -> Text
                             normalizeProbForAccuracy exp got

src/GEval/LogLossHashed.hs

@@ -1,7 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 
 module GEval.LogLossHashed
-       (HashedDistribution, parseDistribution, calculateLogLoss)
+       (HashedDistribution, parseDistribution, calculateLogLoss, parseWordSpecs, wordSpecToPair)
        where
 
 import qualified Data.Vector as V
@@ -59,11 +59,18 @@ isAnyWord _ = False
 
 data WordSpecWithLogProb = WordSpecWithLogProb WordSpec Double
 
+wordSpecToPair :: WordSpecWithLogProb -> Maybe (Double, T.Text)
+wordSpecToPair (WordSpecWithLogProb AnyWord _) = Nothing
+wordSpecToPair (WordSpecWithLogProb (SpecificWord w) lp) = Just (lp, w)
+
 parseDistributionFromWordList :: Word32 -> Word32 -> T.Text -> Either String HashedDistribution
 parseDistributionFromWordList nbOfBits seed distroSpec = (parseDistributionFromWordList' nbOfBits seed) =<<
   normalizeLogProbs =<<
   lookForProbs =<<
-  (processEithers $ map getWordSpecWithLogProb $ T.splitOn " " distroSpec)
+  (parseWordSpecs distroSpec)
+
+parseWordSpecs :: T.Text -> Either String [WordSpecWithLogProb]
+parseWordSpecs distroSpec = processEithers $ map getWordSpecWithLogProb $ T.splitOn " " distroSpec
 
 getWordSpecWithLogProb :: T.Text -> Either String WordSpecWithLogProb
 getWordSpecWithLogProb t =

test/Spec.hs

@@ -293,7 +293,8 @@ main = hspec $ do
   describe "handle --alt-metric option" $ do
     it "accuracy instead of likelihood" $ do
       runGEvalTestExtraOptions ["--alt-metric", "Accuracy"] "likelihood-simple" `shouldReturnAlmost` 0.75
-
+    it "accuracy instead of log loss" $ do
+      runGEvalTestExtraOptions ["--alt-metric", "Accuracy"] "log-loss-hashed-probs" `shouldReturnAlmost` 0.4
 
 neverMatch :: Char -> Int -> Bool
 neverMatch _ _ = False