fix number of digit

src/Gargantext/Core/Viz/Phylo/PhyloMaker.hs

@@ -290,7 +290,8 @@ docsToLastTermFreq :: Int -> [Document] -> Vector Ngrams -> Map Int Double
 docsToLastTermFreq n docs fdt = 
   let last   = take n $ reverse $ sort $ map date docs
       nbDocs = fromIntegral $ length $ filter (\d -> elem (date d) last) docs
-      freqs  = map (/(nbDocs))
+      freqs  = map (\x -> truncate' (x/nbDocs) 4)
+             -- $ map (/(nbDocs))
              $ fromList
              $ map (\lst -> (head' "docsToLastTermFreq" lst, fromIntegral $ length lst)) 
              $ group $ sort $ concat $ map (\d -> nub $ ngramsToIdx (text d) fdt) $ filter (\d -> elem (date d) last) docs

src/Gargantext/Core/Viz/Phylo/PhyloTools.hs

@@ -19,6 +19,8 @@ import Data.Map (Map, elems, fromList, unionWith, keys, member, (!), filterWithK
 import Data.String (String)
 import Data.Text (Text)
 
+import Prelude (floor)
+
 import Gargantext.Prelude
 import Gargantext.Core.Viz.AdaptativePhylo
 import Text.Printf
@@ -56,6 +58,16 @@ printIOComment cmt =
 -- | Misc | --
 --------------
 
+-- truncate' :: Double -> Int -> Double
+-- truncate' x n = (fromIntegral (floor (x * t))) / t
+--     where t = 10^n
+
+truncate' :: Double -> Int -> Double
+truncate' x n = (fromIntegral $ (floor (x * t) :: Int)) / t
+    where 
+        --------------
+        t :: Double
+        t = 10 ^n
 
 roundToStr :: (PrintfArg a, Floating a) => Int -> a -> String
 roundToStr = printf "%0.*f"