Portability | portable |
---|---|
Stability | provisional |
Maintainer | Edward Kmett <ekmett@gmail.com> |
Safe Haskell | Trustworthy |
Operations on free vector spaces.
- class Functor f => Additive f where
- negated :: (Functor f, Num a) => f a -> f a
- (^*) :: (Functor f, Num a) => f a -> a -> f a
- (*^) :: (Functor f, Num a) => a -> f a -> f a
- (^/) :: (Functor f, Fractional a) => f a -> a -> f a
- sumV :: (Foldable f, Additive v, Num a) => f (v a) -> v a
- basis :: (Applicative t, Traversable t, Num a) => [t a]
- basisFor :: (Traversable t, Enum a, Num a) => t a -> [t a]
- kronecker :: (Applicative t, Num a, Traversable t) => t a -> t (t a)
- outer :: (Functor f, Functor g, Num a) => f a -> g a -> f (g a)
Documentation
class Functor f => Additive f whereSource
A vector is an additive group with additional structure.
The zero vector
(^+^) :: Num a => f a -> f a -> f aSource
Compute the sum of two vectors
>>>
V2 1 2 ^+^ V2 3 4
V2 4 6
(^-^) :: Num a => f a -> f a -> f aSource
Compute the difference between two vectors
>>>
V2 4 5 - V2 3 1
V2 1 4
lerp :: Num a => a -> f a -> f a -> f aSource
Linearly interpolate between two vectors.
liftU2 :: (a -> a -> a) -> f a -> f a -> f aSource
Apply a function to merge the 'non-zero' components of two vectors, unioning the rest of the values.
liftI2 :: (a -> b -> c) -> f a -> f b -> f cSource
Apply a function to the components of two vectors.
- For a dense vector this is equivalent to
liftA2
. - For a sparse vector this is equivalent to
intersectionWith
.
Additive [] | |
Additive Complex | |
Additive ZipList | |
Additive Maybe | |
Additive IntMap | |
Additive Identity | |
Additive Vector | |
Additive V0 | |
Additive V1 | |
Additive V2 | |
Additive V3 | |
Additive V4 | |
Additive Plucker | |
Additive Quaternion | |
Additive ((->) b) | |
Ord k => Additive (Map k) | |
(Eq k, Hashable k) => Additive (HashMap k) | |
Additive f => Additive (Point f) | |
Dim k n => Additive (V k n) |
negated :: (Functor f, Num a) => f a -> f aSource
Compute the negation of a vector
>>>
negated (V2 2 4)
V2 (-2) (-4)
(^*) :: (Functor f, Num a) => f a -> a -> f aSource
Compute the right scalar product
>>>
V2 3 4 ^* 2
V2 6 8
(*^) :: (Functor f, Num a) => a -> f a -> f aSource
Compute the left scalar product
>>>
2 *^ V2 3 4
V2 6 8
(^/) :: (Functor f, Fractional a) => f a -> a -> f aSource
Compute division by a scalar on the right.
sumV :: (Foldable f, Additive v, Num a) => f (v a) -> v aSource
Sum over multiple vectors
>>>
sumV [V2 1 1, V2 3 4]
V2 4 5
basis :: (Applicative t, Traversable t, Num a) => [t a]Source
Produce a default basis for a vector space. If the dimensionality
of the vector space is not statically known, see basisFor
.
basisFor :: (Traversable t, Enum a, Num a) => t a -> [t a]Source
Produce a default basis for a vector space from which the argument is drawn.
kronecker :: (Applicative t, Num a, Traversable t) => t a -> t (t a)Source
Produce a diagonal matrix from a vector.