Linear.Trace

Simple matrix operation for low-dimensional primitives.

Documentation

class Functor m => Trace m where

Methods

trace :: Num a => m (m a) -> a

Compute the trace of a matrix

>>> trace (V2 (V2 a b) (V2 c d))
a + d

diagonal :: m (m a) -> m a

Compute the diagonal of a matrix

>>> diagonal (V2 (V2 a b) (V2 c d))
V2 a d

Instances

Trace Complex

Trace IntMap

Trace V0

Trace V2

Trace V3

Trace V4

Trace Plucker

Trace Quaternion

(Eq k, Hashable k) => Trace (HashMap k)

Ord k => Trace (Map k)

Dim n => Trace (V n)

(Distributive g, Trace g, Trace f) => Trace (Compose g f)

(Trace f, Trace g) => Trace (Product f g)