1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE CPP #-}
-----------------------------------------------------------------------------
-- |
-- Module : Data.Packed.Vector
-- Copyright : (c) Alberto Ruiz 2007-10
-- License : BSD3
-- Maintainer : Alberto Ruiz
-- Stability : provisional
--
-- 1D arrays suitable for numeric computations using external libraries.
--
-- This module provides basic functions for manipulation of structure.
--
-----------------------------------------------------------------------------
{-# OPTIONS_HADDOCK hide #-}
module Data.Packed.Vector (
Vector,
fromList, (|>), toList, buildVector,
dim, (@>),
subVector, takesV, vjoin, join,
mapVector, mapVectorWithIndex, zipVector, zipVectorWith, unzipVector, unzipVectorWith,
mapVectorM, mapVectorM_, mapVectorWithIndexM, mapVectorWithIndexM_,
foldLoop, foldVector, foldVectorG, foldVectorWithIndex
) where
import Data.Packed.Internal.Vector
import Foreign.Storable
-------------------------------------------------------------------
#ifdef BINARY
import Data.Binary
import Control.Monad(replicateM)
-- a 64K cache, with a Double taking 13 bytes in Bytestring,
-- implies a chunk size of 5041
chunk :: Int
chunk = 5000
chunks :: Int -> [Int]
chunks d = let c = d `div` chunk
m = d `mod` chunk
in if m /= 0 then reverse (m:(replicate c chunk)) else (replicate c chunk)
putVector v = do
let d = dim v
mapM_ (\i -> put $ v @> i) [0..(d-1)]
getVector d = do
xs <- replicateM d get
return $! fromList xs
instance (Binary a, Storable a) => Binary (Vector a) where
put v = do
let d = dim v
put d
mapM_ putVector $! takesV (chunks d) v
get = do
d <- get
vs <- mapM getVector $ chunks d
return $! vjoin vs
#endif
-------------------------------------------------------------------
{- | creates a Vector of the specified length using the supplied function to
to map the index to the value at that index.
@> buildVector 4 fromIntegral
4 |> [0.0,1.0,2.0,3.0]@
-}
buildVector :: Storable a => Int -> (Int -> a) -> Vector a
buildVector len f =
fromList $ map f [0 .. (len - 1)]
-- | zip for Vectors
zipVector :: (Storable a, Storable b, Storable (a,b)) => Vector a -> Vector b -> Vector (a,b)
zipVector = zipVectorWith (,)
-- | unzip for Vectors
unzipVector :: (Storable a, Storable b, Storable (a,b)) => Vector (a,b) -> (Vector a,Vector b)
unzipVector = unzipVectorWith id
-------------------------------------------------------------------
{-# DEPRECATED join "use vjoin or Data.Vector.concat" #-}
join :: Storable t => [Vector t] -> Vector t
join = vjoin
|
