Data.Packed.Vector

A representation of 1D arrays suitable for numeric computations using external libraries.

Documentation

data Vector t

A one-dimensional array of objects stored in a contiguous memory block.

Instances

Container Vector Double

Linear Vector Double

Joinable Vector Matrix

Joinable Matrix Vector

Mul Vector Matrix Vector

Mul Matrix Vector Vector

Container Vector (Complex Double)

Linear Vector (Complex Double)

(Eq a, Element a) => Eq (Vector a)

Floating (Vector Double)

Floating (Vector (Complex Double))

(Linear Vector a, Num (Vector a)) => Fractional (Vector a)

Num (Vector Double)

Num (Vector (Complex Double))

(Element a, Read a) => Read (Vector a)

(Show a, Storable a) => Show (Vector a)

(Field a, Arbitrary a) => Arbitrary (Vector a)

Storable a => Monoid (Vector a)

Normed (Vector Double)

Normed (Vector (Complex Double))

fromList :: Storable a => [a] -> Vector a

creates a Vector from a list:

> fromList [2,3,5,7]
4 |> [2.0,3.0,5.0,7.0]

(|>) :: Storable a => Int -> [a] -> Vector a

an alternative to fromList with explicit dimension, used also in the instances for Show (Vector a).

toList :: Storable a => Vector a -> [a]

extracts the Vector elements to a list

> toList (linspace 5 (1,10))
[1.0,3.25,5.5,7.75,10.0]

dim :: Vector t -> Int

number of elements

(@>) :: Storable t => Vector t -> Int -> t

Reads a vector position:

> fromList [0..9] @> 7
7.0

subVector

Arguments

:: Storable t

=> Int

index of the starting element

-> Int

number of elements to extract

-> Vector t

source

-> Vector t

result

takes a number of consecutive elements from a Vector

> subVector 2 3 (fromList [1..10])
3 |> [3.0,4.0,5.0]

join :: Storable t => [Vector t] -> Vector t

creates a new Vector by joining a list of Vectors

> join [fromList [1..5], constant 1 3]
8 |> [1.0,2.0,3.0,4.0,5.0,1.0,1.0,1.0]

constant :: Element a => a -> Int -> Vector a

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]

linspace :: Int -> (Double, Double) -> Vector Double

Creates a real vector containing a range of values:

> linspace 5 (-3,7)
5 |> [-3.0,-0.5,2.0,4.5,7.0]

vectorMax :: Vector Double -> Double

vectorMin :: Vector Double -> Double

vectorMaxIndex :: Vector Double -> Int

vectorMinIndex :: Vector Double -> Int

liftVector :: (Storable a, Storable b) => (a -> b) -> Vector a -> Vector b

map on Vectors

liftVector2 :: (Storable a, Storable b, Storable c) => (a -> b -> c) -> Vector a -> Vector b -> Vector c

zipWith for Vectors