5 files changed, 59 insertions, 46 deletions

diff --git a/lib/Data/Packed/Internal/Matrix.hs b/lib/Data/Packed/Internal/Matrix.hs
index 29aba51..57142b7 100644
--- a/lib/Data/Packed/Internal/Matrix.hs
+++ b/lib/Data/Packed/Internal/Matrix.hs
@@ -31,7 +31,8 @@ module Data.Packed.Internal.Matrix(
     liftMatrix, liftMatrix2,
     (@@>),
     saveMatrix,
-    singleton
+    singleton,
+    size, shSize, conformVs, conformMs, conformVTo, conformMTo
 ) where
 
 import Data.Packed.Internal.Common
@@ -441,3 +442,34 @@ saveMatrix filename fmt m = do
     free charfmt
 
 foreign import ccall "matrix_fprintf" matrix_fprintf :: Ptr CChar -> Ptr CChar -> CInt -> TM
+
+----------------------------------------------------------------------
+
+conformMs ms = map (conformMTo (r,c)) ms
+  where
+    r = maximum (map rows ms)
+    c = maximum (map cols ms)
+
+conformVs vs = map (conformVTo n) vs
+  where
+    n = maximum (map dim vs)
+
+conformMTo (r,c) m
+    | size m == (r,c) = m
+    | size m == (1,1) = reshape c (constantD (m@@>(0,0)) (r*c))
+    | size m == (r,1) = repCols c m
+    | size m == (1,c) = repRows r m
+    | otherwise = error $ "matrix " ++ shSize m ++ " cannot be expanded to (" ++ show r ++ "><"++ show c ++")"
+
+conformVTo n v
+    | dim v == n = v
+    | dim v == 1 = constantD (v@>0) n
+    | otherwise = error $ "vector of dim=" ++ show (dim v) ++ " cannot be expanded to dim=" ++ show n
+
+repRows n x = fromRows (replicate n (flatten x))
+repCols n x = fromColumns (replicate n (flatten x))
+
+size m = (rows m, cols m)
+
+shSize m = "(" ++ show (rows m) ++"><"++ show (cols m)++")"
+
diff --git a/lib/Data/Packed/Matrix.hs b/lib/Data/Packed/Matrix.hs
index aad73dd..ab68618 100644
--- a/lib/Data/Packed/Matrix.hs
+++ b/lib/Data/Packed/Matrix.hs
@@ -302,30 +302,22 @@ repmat m r c = fromBlocks $ splitEvery c $ replicate (r*c) m
 -- | A version of 'liftMatrix2' which automatically adapt matrices with a single row or column to match the dimensions of the other matrix.
 liftMatrix2Auto :: (Element t, Element a, Element b) => (Vector a -> Vector b -> Vector t) -> Matrix a -> Matrix b -> Matrix t
 liftMatrix2Auto f m1 m2
-    | compat' m1 m2 = lM f m1 m2
-
-    | r1 == 1  && c2 == 1 = lM f (repRows r2 m1) (repCols c1 m2)
-    | c1 == 1  && r2 == 1 = lM f (repCols c2 m1) (repRows r1 m2)
-    
-    | r1 == r2 && c2 == 1 = lM f m1              (repCols c1 m2)
-    | r1 == r2 && c1 == 1 = lM f (repCols c2 m1) m2
-
-    | c1 == c2 && r2 == 1 = lM f m1              (repRows r1 m2)
-    | c1 == c2 && r1 == 1 = lM f (repRows r2 m1) m2
-
-    | otherwise    = error $ "nonconformable matrices in liftMatrix2Auto: "
-                             ++ show (size m1) ++ ", " ++ show (size m2)
+    | compat' m1 m2 = lM f m1  m2
+    | ok            = lM f m1' m2'
+    | otherwise = error $ "nonconformable matrices in liftMatrix2Auto: " ++ shSize m1 ++ ", " ++ shSize m2
   where
     (r1,c1) = size m1
     (r2,c2) = size m2
-
-size m = (rows m, cols m)
+    r = max r1 r2
+    c = max c1 c2
+    r0 = min r1 r2
+    c0 = min c1 c2
+    ok = r0 == 1 || r1 == r2 && c0 == 1 || c1 == c2
+    m1' = conformMTo (r,c) m1
+    m2' = conformMTo (r,c) m2
 
 lM f m1 m2 = reshape (max (cols m1) (cols m2)) (f (flatten m1) (flatten m2))
 
-repRows n x = fromRows (replicate n (flatten x))
-repCols n x = fromColumns (replicate n (flatten x))
-
 compat' :: Matrix a -> Matrix b -> Bool
 compat' m1 m2 = s1 == (1,1) || s2 == (1,1) || s1 == s2
   where
diff --git a/lib/Numeric/ContainerBoot.hs b/lib/Numeric/ContainerBoot.hs
index 276eaa8..d9f0d78 100644
--- a/lib/Numeric/ContainerBoot.hs
+++ b/lib/Numeric/ContainerBoot.hs
@@ -639,33 +639,12 @@ assocM (r,c) z xs = ST.runSTMatrix $ do
 
 ----------------------------------------------------------------------
 
-conformMTo (r,c) m
-    | size m == (r,c) = m
-    | size m == (1,1) = konst (m@@>(0,0)) (r,c)
-    | size m == (r,1) = repCols c m
-    | size m == (1,c) = repRows r m
-    | otherwise = error $ "matrix " ++ shSize m ++ " cannot be expanded to (" ++ show r ++ "><"++ show c ++")"
-
-conformVTo n v
-    | dim v == n = v
-    | dim v == 1 = konst (v@>0) n
-    | otherwise = error $ "vector of dim=" ++ show (dim v) ++ " cannot be expanded to dim=" ++ show n
-
-repRows n x = fromRows (replicate n (flatten x))
-repCols n x = fromColumns (replicate n (flatten x))
-
-size m = (rows m, cols m)
-
-shSize m = "(" ++ show (rows m) ++"><"++ show (cols m)++")"
-
-condM a b l e t = reshape c $ cond a' b' l' e' t'
+condM a b l e t = reshape (cols a'') $ cond a' b' l' e' t'
   where
-    r = maximum (map rows [a,b,l,e,t])
-    c = maximum (map cols [a,b,l,e,t])
-    [a', b', l', e', t'] = map (flatten . conformMTo (r,c)) [a,b,l,e,t]
+    args@(a'':_) = conformMs [a,b,l,e,t]
+    [a', b', l', e', t'] = map flatten args
 
 condV f a b l e t = f a' b' l' e' t'
   where
-    n = maximum (map dim [a,b,l,e,t])
-    [a', b', l', e', t'] = map (conformVTo n) [a,b,l,e,t]
+    [a', b', l', e', t'] = conformVs [a,b,l,e,t]
 
diff --git a/lib/Numeric/LinearAlgebra/Algorithms.hs b/lib/Numeric/LinearAlgebra/Algorithms.hs
index 83464f4..a6b3174 100644
--- a/lib/Numeric/LinearAlgebra/Algorithms.hs
+++ b/lib/Numeric/LinearAlgebra/Algorithms.hs
@@ -167,8 +167,6 @@ vertical m = rows m >= cols m
 
 exactHermitian m = m `equal` ctrans m
 
-shSize m = "(" ++ show (rows m) ++"><"++ show (cols m)++")"
-
 --------------------------------------------------------------
 
 -- | Full singular value decomposition.
diff --git a/lib/Numeric/LinearAlgebra/Tests.hs b/lib/Numeric/LinearAlgebra/Tests.hs
index 76eaaae..3bcfec5 100644
--- a/lib/Numeric/LinearAlgebra/Tests.hs
+++ b/lib/Numeric/LinearAlgebra/Tests.hs
@@ -380,6 +380,17 @@ condTest = utest "cond" ok
 
 ---------------------------------------------------------------------
 
+conformTest = utest "conform" ok
+  where
+    ok = 1 + row [1,2,3] + col [10,20,30,40] + (4><3) [1..]
+         == (4><3) [13,15,17
+                   ,26,28,30
+                   ,39,41,43
+                   ,52,54,56]
+    row = asRow . fromList
+    col = asColumn . fromList :: [Double] -> Matrix Double
+
+---------------------------------------------------------------------
 
 -- | All tests must pass with a maximum dimension of about 20
 --  (some tests may fail with bigger sizes due to precision loss).
@@ -550,6 +561,7 @@ runTests n = do
         , succTest
         , findAssocTest
         , condTest
+        , conformTest
         ]
     return ()