Re: [Haskell-cafe] recursive matrix computations

2006-04-21 Thread Brian Boutel


On 19/04/2006, at 10:32 PM, Andrew U. Frank wrote:



it appears possible to define matrix operations like LU- 
decomposition, SVD,

inverse etc. in a recursive fashion (see transpose in the prelude).

is this possible? has anybody code in haskell which does this (not  
asking

for high performance here, more instructive value).

thank you!




I recall Paul Hudak coming up with a version of LU-decomposition in  
Haskell using Dooliitle's method.
This was in response to a challenge by (I think) Arvind, at a meeting  
in Mystic CT, in 1989.


--brian


Brian Boutel

Wellington
New Zealand

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RE: [Haskell-cafe] recursive matrix computations

2006-04-19 Thread Andrew U. Frank
 
it appears possible to define matrix operations like LU-decomposition, SVD,
inverse etc. in a recursive fashion (see transpose in the prelude).

is this possible? has anybody code in haskell which does this (not asking
for high performance here, more instructive value).

thank you!

andrew

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RE: [Haskell-cafe] recursive matrix computations

2006-04-19 Thread Henning Thielemann


On Wed, 19 Apr 2006, Andrew U. Frank wrote:


it appears possible to define matrix operations like LU-decomposition, SVD,
inverse etc. in a recursive fashion (see transpose in the prelude).

is this possible? has anybody code in haskell which does this (not asking
for high performance here, more instructive value).


There is some code by Jan Skibinski called 'indexless linear algebra':
 http://www.haskell.org/haskellwiki/Libraries_and_tools/Mathematics
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