[squeak-dev] representing matrix as two dimensional array in Slang

ramiro.diaz.trepat at jpmorgan.com ramiro.diaz.trepat at jpmorgan.com
Wed Oct 1 09:38:19 UTC 2008

I fixed the bug, it was not in Kronecker multiplication but in Schur's 
Complement method, which I had originally used for
the LU Decomposition but later implemented a faster algorithm (from 
Cormen's MIT book on algorithms).
The code works now (version 27), but it needs cleaning.
It also needs faster normal multiplication algorithm, cholesky decomp,, 
eigenvalue finding and a few other basic things.
I released the code as MIT, and it is accesible through squeaksource now 
that it is up again.


"Joseph T. Bore" <jbore at tjtech.com> 
30/09/2008 20:55

Ramiro Diaz Trepat <ramiro at diaztrepat.name>

Re: [squeak-dev] representing matrix as two dimensional array in Slang

oh ok, thanks.


On Tue, 30 Sep 2008, 
Ramiro Diaz Trepat wrote:

> Sorry !
> I meant squeaksource.com
> Just look up Numerics in the projects section.
> I still have to fix the kronecker multiplication, should be done soon.
> Cheers
> r.
> On Tue, Sep 30, 2008 at 3:46 AM, Joseph T. Bore <jbore at tjtech.com> 
>> maybe im blind, but i just looked on squeak map and i dont see that, i 
>> looked on map.squeak.org via the browser and i also dont see it there.
>> can you send a link to the exact location?
>> jb
>> On Sep 29, 2008, at 5:38 PM, Ramiro Diaz Trepat wrote:
>> I have created a package called Numerics in squeakmap that adds has a
>> Vector and Matrix  class that can solve LU decompositions, linear 
>> determinants, normal multiplication, kronecker multiplication and a few
>> other things.
>> It has test cases with examples.
>> It is quite green still but test cases pass.  Although right now I am
>> refactoring a few things and I broke the kronecker multiplication, but 
>> should fix it soon.
>> I wanted to add Cholesky decomposition and eigenvalue finding to it, if 
>> want to join in, you are more than welcome.
>> Cheers
>> r
>> On Mon, Sep 29, 2008 at 6:43 PM, Ang Beepeng <beepeng86 at yahoo.com> 
>>> I want to create a plugin on Gaussian elimination on matrix. The 
>>> of
>>> gaussian elimination in C code are mostly taking in the matrix as two
>>> dimensional array. How can I write it in Slang? How to represent 2
>>> dimensional float matrix in Slang? Are there any examples in Slang?
>>> Thanks for help.
>>> Ang Beepeng
>>> --
>>> View this message in context:

>>> Sent from the Squeak - Dev mailing list archive at Nabble.com.

jbore at tjtech.com

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