Re: [Haskell-cafe] multMM :: Matrix - Matrix - Matrix --multiplies two matrices question (Homework)

2010-02-05 Thread Keith Sheppard
I did a blog post on basic matrix ops which may be useful to you http://blog.keithsheppard.name/2009/06/bird-tracks-through-math-land-basic.html It uses a 2D list representation for matrices which you would not do for any performance critical work. best keith On Wed, Feb 3, 2010 at 1:38 AM,

Re: [Haskell-cafe] multMM :: Matrix - Matrix - Matrix --multiplies two matrices question (Homework)

2010-02-03 Thread Hans Aberg
On 3 Feb 2010, at 07:38, 조광래 wrote: hi i was trying to solve it but All i got is type Matrix=[[Double]] multMM :: Matrix - Matrix - Matrix --multiplies two matrices multMM m t =[[sum (zipWith (*) (head m)(a)) ] ]where a = [head a | a- t] Main multMM [[2,1,-6],[1,-3,2]]

[Haskell-cafe] multMM :: Matrix - Matrix - Matrix --multiplies two matrices question (Homework)

2010-02-02 Thread 조광래
hi i was trying to solve it but All i got is type Matrix=[[Double]] multMM :: Matrix - Matrix - Matrix --multiplies two matrices multMM m t =[[sum (zipWith (*) (head m)(a)) ] ]where a = [head a | a- t] Main multMM [[2,1,-6],[1,-3,2]] [[1,0,-3],[0,4,20],[-2,1,1]] [[14.0]] from this i