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authorAlberto Ruiz <aruiz@um.es>2015-04-10 09:53:23 +0200
committerAlberto Ruiz <aruiz@um.es>2015-04-10 09:53:23 +0200
commite499467d2c67f214b0871376b068c5b6fc7896a1 (patch)
tree166021773cbb2c066811ee27830dd5618114ab10 /examples
parentdcc03a4a764cb8683b80758af97fcbcc9aadba73 (diff)
merge recent
Diffstat (limited to 'examples')
-rw-r--r--examples/inplace.hs39
1 files changed, 20 insertions, 19 deletions
diff --git a/examples/inplace.hs b/examples/inplace.hs
index dcfff56..574aa44 100644
--- a/examples/inplace.hs
+++ b/examples/inplace.hs
@@ -1,9 +1,8 @@
1-- some tests of the interface for pure 1-- some tests of the interface for pure
2-- computations with inplace updates 2-- computations with inplace updates
3 3
4import Numeric.LinearAlgebra 4import Numeric.LinearAlgebra.HMatrix
5import Data.Packed.ST 5import Numeric.LinearAlgebra.Devel
6import Data.Packed.Convert
7 6
8import Data.Array.Unboxed 7import Data.Array.Unboxed
9import Data.Array.ST 8import Data.Array.ST
@@ -15,15 +14,13 @@ main = sequence_[
15 print test2, 14 print test2,
16 print test3, 15 print test3,
17 print test4, 16 print test4,
18 test5, 17-- test5,
19 test6, 18-- test6,
20 print test7, 19-- print test7,
21 test8, 20 test8,
22 test0] 21 test0]
23 22
24-- helper functions 23
25vector l = fromList l :: Vector Double
26norm v = pnorm PNorm2 v
27 24
28-- hmatrix vector and matrix 25-- hmatrix vector and matrix
29v = vector [1..10] 26v = vector [1..10]
@@ -34,16 +31,16 @@ m = (5><10) [1..50::Double]
34-- vector creation by in-place updates on a copy of the argument 31-- vector creation by in-place updates on a copy of the argument
35test1 = fun v 32test1 = fun v
36 33
37fun :: Element t => Vector t -> Vector t 34-- fun :: (Num t, Element t, Container) => Vector t -> Vector t
38fun x = runSTVector $ do 35fun x = runSTVector $ do
39 a <- thawVector x 36 a <- thawVector x
40 mapM_ (flip (modifyVector a) (+57)) [0 .. dim x `div` 2 - 1] 37 mapM_ (flip (modifyVector a) (+57)) [0 .. size x `div` 2 - 1]
41 return a 38 return a
42 39
43-- another example: creation of an antidiagonal matrix from a list 40-- another example: creation of an antidiagonal matrix from a list
44test2 = antiDiag 5 8 [1..] :: Matrix Double 41test2 = antiDiag 5 8 [1..] :: Matrix Double
45 42
46antiDiag :: (Element b) => Int -> Int -> [b] -> Matrix b 43-- antiDiag :: (Element b) => Int -> Int -> [b] -> Matrix b
47antiDiag r c l = runSTMatrix $ do 44antiDiag r c l = runSTMatrix $ do
48 m <- newMatrix 0 r c 45 m <- newMatrix 0 r c
49 let d = min r c - 1 46 let d = min r c - 1
@@ -55,21 +52,23 @@ test3 = g1 v
55 52
56g1 x = runST $ do 53g1 x = runST $ do
57 a <- thawVector x 54 a <- thawVector x
58 writeVector a (dim x -1) 0 55 writeVector a (size x -1) 0
59 b <- freezeVector a 56 b <- freezeVector a
60 return (norm b) 57 return (norm_2 b)
61 58
62-- another possibility: 59-- another possibility:
63test4 = g2 v 60test4 = g2 v
64 61
65g2 x = runST $ do 62g2 x = runST $ do
66 a <- thawVector x 63 a <- thawVector x
67 writeVector a (dim x -1) 0 64 writeVector a (size x -1) 0
68 t <- liftSTVector norm a 65 t <- liftSTVector norm_2 a
69 return t 66 return t
70 67
71-------------------------------------------------------------- 68--------------------------------------------------------------
72 69
70{-
71
73-- haskell arrays 72-- haskell arrays
74hv = listArray (0,9) [1..10::Double] 73hv = listArray (0,9) [1..10::Double]
75hm = listArray ((0,0),(4,9)) [1..50::Double] 74hm = listArray ((0,0),(4,9)) [1..50::Double]
@@ -78,8 +77,8 @@ hm = listArray ((0,0),(4,9)) [1..50::Double]
78 77
79-- conversion from standard Haskell arrays 78-- conversion from standard Haskell arrays
80test5 = do 79test5 = do
81 print $ norm (vectorFromArray hv) 80 print $ norm_2 (vectorFromArray hv)
82 print $ norm v 81 print $ norm_2 v
83 print $ rcond (matrixFromArray hm) 82 print $ rcond (matrixFromArray hm)
84 print $ rcond m 83 print $ rcond m
85 84
@@ -101,10 +100,11 @@ test7 = unitary (listArray (1,4) [3,5,7,2] :: UArray Int Double)
101 100
102unitary v = runSTUArray $ do 101unitary v = runSTUArray $ do
103 a <- thaw v 102 a <- thaw v
104 n <- norm `fmap` vectorFromMArray a 103 n <- norm_2 `fmap` vectorFromMArray a
105 b <- mapArray (/n) a 104 b <- mapArray (/n) a
106 return b 105 return b
107 106
107-}
108------------------------------------------------- 108-------------------------------------------------
109 109
110-- (just to check that they are not affected) 110-- (just to check that they are not affected)
@@ -150,3 +150,4 @@ test8 = do
150 print $ histoCheck2 ds 150 print $ histoCheck2 ds
151 print $ histoCheck2 ds 151 print $ histoCheck2 ds
152 putStrLn "----------------------" 152 putStrLn "----------------------"
153