Data.Array.Repa.Unsafe

Functions without sanity or bounds checks.

Documentation

unsafeBackpermute

Arguments

:: forall r sh1 sh2 e . (Shape sh1, Shape sh2, Source r e)

=> sh2

Extent of result array.

-> (sh2 -> sh1)

Function mapping each index in the result array to an index of the source array.

-> Array r sh1 e

Source array.

-> Array D sh2 e

Backwards permutation of an array's elements.

unsafeBackpermuteDft

Arguments

:: forall r1 r2 sh1 sh2 e . (Shape sh1, Shape sh2, Source r1 e, Source r2 e)

=> Array r2 sh2 e

Default values (arrDft)

-> (sh2 -> Maybe sh1)

Function mapping each index in the result array to an index in the source array.

-> Array r1 sh1 e

Source array.

-> Array D sh2 e

Default backwards permutation of an array's elements. If the function returns Nothing then the value at that index is taken from the default array (arrDft)

unsafeSlice :: (Slice sl, Shape (FullShape sl), Shape (SliceShape sl), Source r e) => Array r (FullShape sl) e -> sl -> Array D (SliceShape sl) e

Take a slice from an array, according to a given specification.

For example, to take a row from a matrix use the following:

slice arr (Any :. (5::Int) :. All)

To take a column use:

slice arr (Any :. (5::Int))

unsafeExtend :: (Slice sl, Shape (SliceShape sl), Shape (FullShape sl), Source r e) => sl -> Array r (SliceShape sl) e -> Array D (FullShape sl) e

Extend an array, according to a given slice specification.

For example, to replicate the rows of an array use the following:

extend arr (Any :. (5::Int) :. All)

unsafeTraverse

Arguments

:: forall r sh sh' a b . (Source r a, Shape sh, Shape sh')

=> Array r sh a

Source array.

-> (sh -> sh')

Function to produce the extent of the result.

-> ((sh -> a) -> sh' -> b)

Function to produce elements of the result. It is passed a lookup function to get elements of the source.

-> Array D sh' b

Unstructured traversal.

unsafeTraverse2

Arguments

:: forall r1 r2 sh sh' sh'' a b c . (Source r1 a, Source r2 b, Shape sh, Shape sh', Shape sh'')

=> Array r1 sh a

First source array.

-> Array r2 sh' b

Second source array.

-> (sh -> sh' -> sh'')

Function to produce the extent of the result.

-> ((sh -> a) -> (sh' -> b) -> sh'' -> c)

Function to produce elements of the result. It is passed lookup functions to get elements of the source arrays.

-> Array D sh'' c

Unstructured traversal over two arrays at once.

unsafeTraverse3 :: forall r1 r2 r3 sh1 sh2 sh3 sh4 a b c d. (Source r1 a, Source r2 b, Source r3 c, Shape sh1, Shape sh2, Shape sh3, Shape sh4) => Array r1 sh1 a -> Array r2 sh2 b -> Array r3 sh3 c -> (sh1 -> sh2 -> sh3 -> sh4) -> ((sh1 -> a) -> (sh2 -> b) -> (sh3 -> c) -> sh4 -> d) -> Array D sh4 d

Unstructured traversal over three arrays at once.

unsafeTraverse4 :: forall r1 r2 r3 r4 sh1 sh2 sh3 sh4 sh5 a b c d e. (Source r1 a, Source r2 b, Source r3 c, Source r4 d, Shape sh1, Shape sh2, Shape sh3, Shape sh4, Shape sh5) => Array r1 sh1 a -> Array r2 sh2 b -> Array r3 sh3 c -> Array r4 sh4 d -> (sh1 -> sh2 -> sh3 -> sh4 -> sh5) -> ((sh1 -> a) -> (sh2 -> b) -> (sh3 -> c) -> (sh4 -> d) -> sh5 -> e) -> Array D sh5 e

Unstructured traversal over four arrays at once.