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|
-----------------------------------------------------------------------------
-- |
-- Module : Data.Packed.Vector
-- Copyright : (c) Alberto Ruiz 2007
-- License : GPL-style
--
-- Maintainer : Alberto Ruiz <aruiz@um.es>
-- Stability : provisional
-- Portability : portable
--
-- A representation of 1D arrays suitable for numeric computations using external libraries.
--
-----------------------------------------------------------------------------
module Data.Packed.Vector (
Vector,
fromList, (|>), toList,
dim, (@>),
subVector, join,
constant, linspace,
vectorMax, vectorMin, vectorMaxIndex, vectorMinIndex,
liftVector, liftVector2
) where
import Data.Packed.Internal
import Numeric.GSL.Vector
import Data.Packed.ST
{- | Creates a real vector containing a range of values:
@\> linspace 5 (-3,7)
5 |> [-3.0,-0.5,2.0,4.5,7.0]@
-}
linspace :: Int -> (Double, Double) -> Vector Double
linspace n (a,b) = add a $ scale s $ fromList [0 .. fromIntegral n-1]
where scale = vectorMapValR Scale
add = vectorMapValR AddConstant
s = (b-a)/fromIntegral (n-1)
vectorMax :: Vector Double -> Double
vectorMax = toScalarR Max
vectorMin :: Vector Double -> Double
vectorMin = toScalarR Min
vectorMaxIndex :: Vector Double -> Int
vectorMaxIndex = round . toScalarR MaxIdx
vectorMinIndex :: Vector Double -> Int
vectorMinIndex = round . toScalarR MinIdx
{- | creates a vector with a given number of equal components:
@> constant 2 7
7 |> [2.0,2.0,2.0,2.0,2.0,2.0,2.0]@
-}
constant :: Element a => a -> Int -> Vector a
constant x n = runSTVector (newVector x n)
|
