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1 {-|
2 Module : Gargantext.Core.Viz.Phylo.PhyloTools
3 Description : Module dedicated to all the tools needed for making a Phylo
4 Copyright : (c) CNRS, 2017-Present
5 License : AGPL + CECILL v3
6 Maintainer : team@gargantext.org
7 Stability : experimental
8 Portability : POSIX
9 -}
10
11 {-# LANGUAGE ViewPatterns #-}
12
13 module Gargantext.Core.Viz.Phylo.PhyloTools where
14
15 import Data.Vector (Vector, elemIndex)
16 import Data.List (sort, concat, null, union, (++), tails, sortOn, nub, init, tail, partition, tails, nubBy, group)
17 import Data.Set (Set, disjoint)
18 import Data.Map (Map, elems, fromList, unionWith, keys, member, (!), filterWithKey, fromListWith, empty, restrictKeys)
19 import Data.String (String)
20 import Data.Text (Text)
21
22 import Prelude (floor)
23
24 import Gargantext.Prelude
25 import Gargantext.Core.Viz.AdaptativePhylo
26 import Text.Printf
27
28
29 import Debug.Trace (trace)
30 import Control.Lens hiding (Level)
31
32 import qualified Data.Vector as Vector
33 import qualified Data.List as List
34 import qualified Data.Set as Set
35 import qualified Data.Map as Map
36 import qualified Data.Text as Text
37
38 ------------
39 -- | Io | --
40 ------------
41
42 -- | To print an important message as an IO()
43 printIOMsg :: String -> IO ()
44 printIOMsg msg =
45 putStrLn ( "\n"
46 <> "------------"
47 <> "\n"
48 <> "-- | " <> msg <> "\n" )
49
50
51 -- | To print a comment as an IO()
52 printIOComment :: String -> IO ()
53 printIOComment cmt =
54 putStrLn ( "\n" <> cmt <> "\n" )
55
56
57 --------------
58 -- | Misc | --
59 --------------
60
61 -- truncate' :: Double -> Int -> Double
62 -- truncate' x n = (fromIntegral (floor (x * t))) / t
63 -- where t = 10^n
64
65 truncate' :: Double -> Int -> Double
66 truncate' x n = (fromIntegral $ (floor (x * t) :: Int)) / t
67 where
68 --------------
69 t :: Double
70 t = 10 ^n
71
72 getInMap :: Int -> Map Int Double -> Double
73 getInMap k m =
74 if (member k m)
75 then m ! k
76 else 0
77
78 roundToStr :: (PrintfArg a, Floating a) => Int -> a -> String
79 roundToStr = printf "%0.*f"
80
81
82 countSup :: Double -> [Double] -> Int
83 countSup s l = length $ filter (>s) l
84
85
86 dropByIdx :: Int -> [a] -> [a]
87 dropByIdx k l = take k l ++ drop (k+1) l
88
89
90 elemIndex' :: Eq a => a -> [a] -> Int
91 elemIndex' e l = case (List.elemIndex e l) of
92 Nothing -> panic ("[ERR][Viz.Phylo.PhyloTools] element not in list")
93 Just i -> i
94
95
96 commonPrefix :: Eq a => [a] -> [a] -> [a] -> [a]
97 commonPrefix lst lst' acc =
98 if (null lst || null lst')
99 then acc
100 else if (head' "commonPrefix" lst == head' "commonPrefix" lst')
101 then commonPrefix (tail lst) (tail lst') (acc ++ [head' "commonPrefix" lst])
102 else acc
103
104
105 ---------------------
106 -- | Foundations | --
107 ---------------------
108
109
110 -- | Is this Ngrams a Foundations Root ?
111 isRoots :: Ngrams -> Vector Ngrams -> Bool
112 isRoots n ns = Vector.elem n ns
113
114 -- | To transform a list of nrams into a list of foundation's index
115 ngramsToIdx :: [Ngrams] -> Vector Ngrams -> [Int]
116 ngramsToIdx ns fdt = map (\n -> fromJust $ elemIndex n fdt) ns
117
118 -- | To transform a list of Ngrams Indexes into a Label
119 ngramsToLabel :: Vector Ngrams -> [Int] -> Text
120 ngramsToLabel ngrams l = Text.unwords $ tail' "ngramsToLabel" $ concat $ map (\n -> ["|",n]) $ ngramsToText ngrams l
121
122 idxToLabel :: [Int] -> String
123 idxToLabel l = List.unwords $ tail' "idxToLabel" $ concat $ map (\n -> ["|",show n]) l
124
125 idxToLabel' :: [Double] -> String
126 idxToLabel' l = List.unwords $ tail' "idxToLabel" $ concat $ map (\n -> ["|",show n]) l
127
128 -- | To transform a list of Ngrams Indexes into a list of Text
129 ngramsToText :: Vector Ngrams -> [Int] -> [Text]
130 ngramsToText ngrams l = map (\idx -> ngrams Vector.! idx) l
131
132
133 --------------
134 -- | Time | --
135 --------------
136
137 -- | To transform a list of periods into a set of Dates
138 periodsToYears :: [(Date,Date)] -> Set Date
139 periodsToYears periods = (Set.fromList . sort . concat)
140 $ map (\(d,d') -> [d..d']) periods
141
142
143 findBounds :: [Date] -> (Date,Date)
144 findBounds dates =
145 let dates' = sort dates
146 in (head' "findBounds" dates', last' "findBounds" dates')
147
148
149 toPeriods :: [Date] -> Int -> Int -> [(Date,Date)]
150 toPeriods dates p s =
151 let (start,end) = findBounds dates
152 in map (\dates' -> (head' "toPeriods" dates', last' "toPeriods" dates'))
153 $ chunkAlong p s [start .. end]
154
155
156 -- | Get a regular & ascendante timeScale from a given list of dates
157 toTimeScale :: [Date] -> Int -> [Date]
158 toTimeScale dates step =
159 let (start,end) = findBounds dates
160 in [start, (start + step) .. end]
161
162
163 getTimeStep :: TimeUnit -> Int
164 getTimeStep time = case time of
165 Year _ s _ -> s
166
167 getTimePeriod :: TimeUnit -> Int
168 getTimePeriod time = case time of
169 Year p _ _ -> p
170
171 getTimeFrame :: TimeUnit -> Int
172 getTimeFrame time = case time of
173 Year _ _ f -> f
174
175 -------------
176 -- | Fis | --
177 -------------
178
179
180 -- | To find if l' is nested in l
181 isNested :: Eq a => [a] -> [a] -> Bool
182 isNested l l'
183 | null l' = True
184 | length l' > length l = False
185 | (union l l') == l = True
186 | otherwise = False
187
188
189 -- | To filter Fis with small Support but by keeping non empty Periods
190 keepFilled :: (Int -> [a] -> [a]) -> Int -> [a] -> [a]
191 keepFilled f thr l = if (null $ f thr l) && (not $ null l)
192 then keepFilled f (thr - 1) l
193 else f thr l
194
195
196 traceClique :: Map (Date, Date) [PhyloClique] -> String
197 traceClique mFis = foldl (\msg cpt -> msg <> show (countSup cpt cliques) <> " (>" <> show (cpt) <> ") " ) "" [1..6]
198 where
199 --------------------------------------
200 cliques :: [Double]
201 cliques = sort $ map (fromIntegral . length . _phyloClique_nodes) $ concat $ elems mFis
202 --------------------------------------
203
204
205 traceSupport :: Map (Date, Date) [PhyloClique] -> String
206 traceSupport mFis = foldl (\msg cpt -> msg <> show (countSup cpt supports) <> " (>" <> show (cpt) <> ") " ) "" [1..6]
207 where
208 --------------------------------------
209 supports :: [Double]
210 supports = sort $ map (fromIntegral . _phyloClique_support) $ concat $ elems mFis
211 --------------------------------------
212
213
214 traceFis :: [Char] -> Map (Date, Date) [PhyloClique] -> Map (Date, Date) [PhyloClique]
215 traceFis msg mFis = trace ( "\n" <> "-- | " <> msg <> " : " <> show (sum $ map length $ elems mFis) <> "\n"
216 <> "Support : " <> (traceSupport mFis) <> "\n"
217 <> "Nb Ngrams : " <> (traceClique mFis) <> "\n" ) mFis
218
219
220 ---------------
221 -- | Clique| --
222 ---------------
223
224
225 getCliqueSupport :: Clique -> Int
226 getCliqueSupport unit = case unit of
227 Fis s _ -> s
228 MaxClique _ -> 0
229
230 getCliqueSize :: Clique -> Int
231 getCliqueSize unit = case unit of
232 Fis _ s -> s
233 MaxClique s -> s
234
235
236 --------------
237 -- | Cooc | --
238 --------------
239
240 listToCombi' :: [a] -> [(a,a)]
241 listToCombi' l = [(x,y) | (x:rest) <- tails l, y <- rest]
242
243 listToEqual' :: Eq a => [a] -> [(a,a)]
244 listToEqual' l = [(x,y) | x <- l, y <- l, x == y]
245
246 listToKeys :: Eq a => [a] -> [(a,a)]
247 listToKeys lst = (listToCombi' lst) ++ (listToEqual' lst)
248
249 listToMatrix :: [Int] -> Map (Int,Int) Double
250 listToMatrix lst = fromList $ map (\k -> (k,1)) $ listToKeys $ sort lst
251
252 listToMatrix' :: [Ngrams] -> Map (Ngrams,Ngrams) Int
253 listToMatrix' lst = fromList $ map (\k -> (k,1)) $ listToKeys $ sort lst
254
255 listToSeq :: Eq a => [a] -> [(a,a)]
256 listToSeq l = nubBy (\x y -> fst x == fst y) $ [ (x,y) | (x:rest) <- tails l, y <- rest ]
257
258 sumCooc :: Cooc -> Cooc -> Cooc
259 sumCooc cooc cooc' = unionWith (+) cooc cooc'
260
261 getTrace :: Cooc -> Double
262 getTrace cooc = sum $ elems $ filterWithKey (\(k,k') _ -> k == k') cooc
263
264 coocToDiago :: Cooc -> Cooc
265 coocToDiago cooc = filterWithKey (\(k,k') _ -> k == k') cooc
266
267 -- | To build the local cooc matrix of each phylogroup
268 ngramsToCooc :: [Int] -> [Cooc] -> Cooc
269 ngramsToCooc ngrams coocs =
270 let cooc = foldl (\acc cooc' -> sumCooc acc cooc') empty coocs
271 pairs = listToKeys ngrams
272 in filterWithKey (\k _ -> elem k pairs) cooc
273
274
275 --------------------
276 -- | PhyloGroup | --
277 --------------------
278
279 getGroupId :: PhyloGroup -> PhyloGroupId
280 getGroupId g = ((g ^. phylo_groupPeriod, g ^. phylo_groupLevel), g ^. phylo_groupIndex)
281
282 idToPrd :: PhyloGroupId -> PhyloPeriodId
283 idToPrd id = (fst . fst) id
284
285 groupByField :: Ord a => (PhyloGroup -> a) -> [PhyloGroup] -> Map a [PhyloGroup]
286 groupByField toField groups = fromListWith (++) $ map (\g -> (toField g, [g])) groups
287
288 getPeriodPointers :: Filiation -> PhyloGroup -> [Pointer]
289 getPeriodPointers fil g =
290 case fil of
291 ToChilds -> g ^. phylo_groupPeriodChilds
292 ToParents -> g ^. phylo_groupPeriodParents
293
294 filterProximity :: Proximity -> Double -> Double -> Bool
295 filterProximity proximity thr local =
296 case proximity of
297 WeightedLogJaccard _ -> local >= thr
298 Hamming -> undefined
299
300 getProximityName :: Proximity -> String
301 getProximityName proximity =
302 case proximity of
303 WeightedLogJaccard _ -> "WLJaccard"
304 Hamming -> "Hamming"
305
306 ---------------
307 -- | Phylo | --
308 ---------------
309
310 addPointers :: Filiation -> PointerType -> [Pointer] -> PhyloGroup -> PhyloGroup
311 addPointers fil pty pointers g =
312 case pty of
313 TemporalPointer -> case fil of
314 ToChilds -> g & phylo_groupPeriodChilds .~ pointers
315 ToParents -> g & phylo_groupPeriodParents .~ pointers
316 LevelPointer -> case fil of
317 ToChilds -> g & phylo_groupLevelChilds .~ pointers
318 ToParents -> g & phylo_groupLevelParents .~ pointers
319
320
321 getPeriodIds :: Phylo -> [(Date,Date)]
322 getPeriodIds phylo = sortOn fst
323 $ keys
324 $ phylo ^. phylo_periods
325
326 getLevelParentId :: PhyloGroup -> PhyloGroupId
327 getLevelParentId g = fst $ head' "getLevelParentId" $ g ^. phylo_groupLevelParents
328
329 getLastLevel :: Phylo -> Level
330 getLastLevel phylo = last' "lastLevel" $ getLevels phylo
331
332 getLevels :: Phylo -> [Level]
333 getLevels phylo = nub
334 $ map snd
335 $ keys $ view ( phylo_periods
336 . traverse
337 . phylo_periodLevels ) phylo
338
339 getSeaElevation :: Phylo -> SeaElevation
340 getSeaElevation phylo = seaElevation (getConfig phylo)
341
342
343 getConfig :: Phylo -> Config
344 getConfig phylo = (phylo ^. phylo_param) ^. phyloParam_config
345
346
347 getRoots :: Phylo -> Vector Ngrams
348 getRoots phylo = (phylo ^. phylo_foundations) ^. foundations_roots
349
350 phyloToLastBranches :: Phylo -> [[PhyloGroup]]
351 phyloToLastBranches phylo = elems
352 $ fromListWith (++)
353 $ map (\g -> (g ^. phylo_groupBranchId, [g]))
354 $ getGroupsFromLevel (last' "byBranches" $ getLevels phylo) phylo
355
356 getGroupsFromLevel :: Level -> Phylo -> [PhyloGroup]
357 getGroupsFromLevel lvl phylo =
358 elems $ view ( phylo_periods
359 . traverse
360 . phylo_periodLevels
361 . traverse
362 . filtered (\phyloLvl -> phyloLvl ^. phylo_levelLevel == lvl)
363 . phylo_levelGroups ) phylo
364
365
366 getGroupsFromLevelPeriods :: Level -> [PhyloPeriodId] -> Phylo -> [PhyloGroup]
367 getGroupsFromLevelPeriods lvl periods phylo =
368 elems $ view ( phylo_periods
369 . traverse
370 . filtered (\phyloPrd -> elem (phyloPrd ^. phylo_periodPeriod) periods)
371 . phylo_periodLevels
372 . traverse
373 . filtered (\phyloLvl -> phyloLvl ^. phylo_levelLevel == lvl)
374 . phylo_levelGroups ) phylo
375
376
377 getGroupsFromPeriods :: Level -> Map PhyloPeriodId PhyloPeriod -> [PhyloGroup]
378 getGroupsFromPeriods lvl periods =
379 elems $ view ( traverse
380 . phylo_periodLevels
381 . traverse
382 . filtered (\phyloLvl -> phyloLvl ^. phylo_levelLevel == lvl)
383 . phylo_levelGroups ) periods
384
385
386 updatePhyloGroups :: Level -> Map PhyloGroupId PhyloGroup -> Phylo -> Phylo
387 updatePhyloGroups lvl m phylo =
388 over ( phylo_periods
389 . traverse
390 . phylo_periodLevels
391 . traverse
392 . filtered (\phyloLvl -> phyloLvl ^. phylo_levelLevel == lvl)
393 . phylo_levelGroups
394 . traverse
395 ) (\g ->
396 let id = getGroupId g
397 in
398 if member id m
399 then m ! id
400 else g ) phylo
401
402
403 traceToPhylo :: Level -> Phylo -> Phylo
404 traceToPhylo lvl phylo =
405 trace ("\n" <> "-- | End of phylo making at level " <> show (lvl) <> " with "
406 <> show (length $ getGroupsFromLevel lvl phylo) <> " groups and "
407 <> show (length $ nub $ map _phylo_groupBranchId $ getGroupsFromLevel lvl phylo) <> " branches" <> "\n") phylo
408
409 --------------------
410 -- | Clustering | --
411 --------------------
412
413 mergeBranchIds :: [[Int]] -> [Int]
414 mergeBranchIds ids = (head' "mergeBranchIds" . sort . mostFreq') ids
415 where
416 -- | 2) find the most Up Left ids in the hierarchy of similarity
417 -- mostUpLeft :: [[Int]] -> [[Int]]
418 -- mostUpLeft ids' =
419 -- let groupIds = (map (\gIds -> (length $ head' "gIds" gIds, head' "gIds" gIds)) . groupBy (\id id' -> length id == length id') . sortOn length) ids'
420 -- inf = (fst . minimum) groupIds
421 -- in map snd $ filter (\gIds -> fst gIds == inf) groupIds
422 -- | 1) find the most frequent ids
423 mostFreq' :: [[Int]] -> [[Int]]
424 mostFreq' ids' =
425 let groupIds = (map (\gIds -> (length gIds, head' "gIds" gIds)) . group . sort) ids'
426 sup = (fst . maximum) groupIds
427 in map snd $ filter (\gIds -> fst gIds == sup) groupIds
428
429
430 mergeMeta :: [Int] -> [PhyloGroup] -> Map Text [Double]
431 mergeMeta bId groups =
432 let ego = head' "mergeMeta" $ filter (\g -> (snd (g ^. phylo_groupBranchId)) == bId) groups
433 in fromList [("breaks",(ego ^. phylo_groupMeta) ! "breaks"),("seaLevels",(ego ^. phylo_groupMeta) ! "seaLevels")]
434
435
436 groupsToBranches :: Map PhyloGroupId PhyloGroup -> [[PhyloGroup]]
437 groupsToBranches groups =
438 {- run the related component algorithm -}
439 let egos = map (\g -> [getGroupId g]
440 ++ (map fst $ g ^. phylo_groupPeriodParents)
441 ++ (map fst $ g ^. phylo_groupPeriodChilds)
442 ++ (map fst $ g ^. phylo_groupAncestors)) $ elems groups
443 graph = relatedComponents egos
444 {- update each group's branch id -}
445 in map (\ids ->
446 let groups' = elems $ restrictKeys groups (Set.fromList ids)
447 bId = mergeBranchIds $ map (\g -> snd $ g ^. phylo_groupBranchId) groups'
448 in map (\g -> g & phylo_groupBranchId %~ (\(lvl,_) -> (lvl,bId))) groups') graph
449
450 relatedComponents :: Ord a => [[a]] -> [[a]]
451 relatedComponents graph = foldl' (\acc groups ->
452 if (null acc)
453 then acc ++ [groups]
454 else
455 let acc' = partition (\groups' -> disjoint (Set.fromList groups') (Set.fromList groups)) acc
456 in (fst acc') ++ [nub $ concat $ (snd acc') ++ [groups]]) [] graph
457
458 toRelatedComponents :: [PhyloGroup] -> [((PhyloGroup,PhyloGroup),Double)] -> [[PhyloGroup]]
459 toRelatedComponents nodes edges =
460 let ref = fromList $ map (\g -> (getGroupId g, g)) nodes
461 clusters = relatedComponents $ ((map (\((g,g'),_) -> [getGroupId g, getGroupId g']) edges) ++ (map (\g -> [getGroupId g]) nodes))
462 in map (\cluster -> map (\gId -> ref ! gId) cluster) clusters
463
464
465 traceSynchronyEnd :: Phylo -> Phylo
466 traceSynchronyEnd phylo =
467 trace ( "\n" <> "-- | End synchronic clustering at level " <> show (getLastLevel phylo)
468 <> " with " <> show (length $ getGroupsFromLevel (getLastLevel phylo) phylo) <> " groups"
469 <> " and " <> show (length $ nub $ map _phylo_groupBranchId $ getGroupsFromLevel (getLastLevel phylo) phylo) <> " branches"
470 <> "\n" ) phylo
471
472 traceSynchronyStart :: Phylo -> Phylo
473 traceSynchronyStart phylo =
474 trace ( "\n" <> "-- | Start synchronic clustering at level " <> show (getLastLevel phylo)
475 <> " with " <> show (length $ getGroupsFromLevel (getLastLevel phylo) phylo) <> " groups"
476 <> " and " <> show (length $ nub $ map _phylo_groupBranchId $ getGroupsFromLevel (getLastLevel phylo) phylo) <> " branches"
477 <> "\n" ) phylo
478
479
480 -------------------
481 -- | Proximity | --
482 -------------------
483
484 getSensibility :: Proximity -> Double
485 getSensibility proxi = case proxi of
486 WeightedLogJaccard s -> s
487 Hamming -> undefined
488
489 ----------------
490 -- | Branch | --
491 ----------------
492
493 intersectInit :: Eq a => [a] -> [a] -> [a] -> [a]
494 intersectInit acc lst lst' =
495 if (null lst) || (null lst')
496 then acc
497 else if (head' "intersectInit" lst) == (head' "intersectInit" lst')
498 then intersectInit (acc ++ [head' "intersectInit" lst]) (tail lst) (tail lst')
499 else acc
500
501 branchIdsToProximity :: PhyloBranchId -> PhyloBranchId -> Double -> Double -> Double
502 branchIdsToProximity id id' thrInit thrStep = thrInit + thrStep * (fromIntegral $ length $ intersectInit [] (snd id) (snd id'))
503
504 ngramsInBranches :: [[PhyloGroup]] -> [Int]
505 ngramsInBranches branches = nub $ foldl (\acc g -> acc ++ (g ^. phylo_groupNgrams)) [] $ concat branches
506
507
508 traceMatchSuccess :: Double -> Double -> Double -> [[[PhyloGroup]]] -> [[[PhyloGroup]]]
509 traceMatchSuccess thr qua qua' nextBranches =
510 trace ( "\n" <> "-- local branches : " <> (init $ show ((init . init . snd)
511 $ (head' "trace" $ head' "trace" $ head' "trace" nextBranches) ^. phylo_groupBranchId))
512 <> ",(1.." <> show (length nextBranches) <> ")]"
513 <> " | " <> show ((length . concat . concat) nextBranches) <> " groups" <> "\n"
514 <> " - splited with success in " <> show (map length nextBranches) <> " sub-branches" <> "\n"
515 <> " - for the local threshold " <> show (thr) <> " ( quality : " <> show (qua) <> " < " <> show(qua') <> ")\n" ) nextBranches
516
517
518 traceMatchFailure :: Double -> Double -> Double -> [[PhyloGroup]] -> [[PhyloGroup]]
519 traceMatchFailure thr qua qua' branches =
520 trace ( "\n" <> "-- local branches : " <> (init $ show ((init . snd) $ (head' "trace" $ head' "trace" branches) ^. phylo_groupBranchId))
521 <> ",(1.." <> show (length branches) <> ")]"
522 <> " | " <> show (length $ concat branches) <> " groups" <> "\n"
523 <> " - split with failure for the local threshold " <> show (thr) <> " ( quality : " <> show (qua) <> " > " <> show(qua') <> ")\n"
524 ) branches
525
526
527 traceMatchNoSplit :: [[PhyloGroup]] -> [[PhyloGroup]]
528 traceMatchNoSplit branches =
529 trace ( "\n" <> "-- local branches : " <> (init $ show ((init . snd) $ (head' "trace" $ head' "trace" branches) ^. phylo_groupBranchId))
530 <> ",(1.." <> show (length branches) <> ")]"
531 <> " | " <> show (length $ concat branches) <> " groups" <> "\n"
532 <> " - unable to split in smaller branches" <> "\n"
533 ) branches
534
535
536 traceMatchLimit :: [[PhyloGroup]] -> [[PhyloGroup]]
537 traceMatchLimit branches =
538 trace ( "\n" <> "-- local branches : " <> (init $ show ((init . snd) $ (head' "trace" $ head' "trace" branches) ^. phylo_groupBranchId))
539 <> ",(1.." <> show (length branches) <> ")]"
540 <> " | " <> show (length $ concat branches) <> " groups" <> "\n"
541 <> " - unable to increase the threshold above 1" <> "\n"
542 ) branches
543
544
545 traceMatchEnd :: [PhyloGroup] -> [PhyloGroup]
546 traceMatchEnd groups =
547 trace ("\n" <> "-- | End temporal matching with " <> show (length $ nub $ map (\g -> g ^. phylo_groupBranchId) groups)
548 <> " branches and " <> show (length groups) <> " groups" <> "\n") groups
549
550
551 traceTemporalMatching :: [PhyloGroup] -> [PhyloGroup]
552 traceTemporalMatching groups =
553 trace ( "\n" <> "-- | Start temporal matching for " <> show(length groups) <> " groups" <> "\n") groups
554
555
556 traceGroupsProxi :: Map (PhyloGroupId,PhyloGroupId) Double -> Map (PhyloGroupId,PhyloGroupId) Double
557 traceGroupsProxi m =
558 trace ( "\n" <> "-- | " <> show(Map.size m) <> " computed pairs of groups proximity" <> "\n") m