Haskell Matrix Library...

[Henning Thielemann]

On Tue, 14 Jun 2005, Bulat Ziganshin wrote:

> Hello Keean,
>
> Tuesday, June 14, 2005, 3:54:08 PM, you wrote:
>
> KS>     class Functor m where
> KS>        fmap :: a -> b -> m a -> m b
>
> KS>     But the type of "mmap" is
>
> KS>     mmap :: e -> e -> Matrix a i e -> Matrix a i e
>
> KS>     in other words we map values to the same type, not a different type.
>
> mmap should be
>
> mmap :: (e -> e1) -> Matrix a i e -> Matrix a i e1
>
> for example, we can map matrix of strings to matrix of its lengths

... or a real valued matrix to a complex valued one.