[PD] Matrix in pd

lucaturchet1982 at libero.it lucaturchet1982 at libero.it
Wed May 17 11:27:47 CEST 2006

thanks to answearing me.

I needed only multiplication of 18 x 18 matrix, 
I tested the efficience of the matrix object and
I conclueded that for what I have to do they works 
very good.

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>From      : "IOhannes m zmoelnig" zmoelnig at iem.at
To          : "lucaturchet1982 at libero.it" lucaturchet1982 at libero.it
Cc          : "pd-list" pd-list at iem.at
Date      : Tue, 16 May 2006 11:56:46 +0200
Subject : Re: [PD] Matrix in pd

> lucaturchet1982 at libero.it wrote:
> > Are there some pd-libraries that implements matrix objects?
> so you found them already...
> > 
> > Where can I found it? Are they efficient?
> iemmatrix is not written to be especially efficient. i am sure most 
> things could be done in a more efficient way (however i tried to choose 
> efficient algorithms rather than efficient implementations)
> > 
> > In fact I need to do multiplications in real-time
> > and the efficience of calcoulation is a strict requirement
> personally i believe than an implementation need not be "efficient" per 
> se, just "efficient enough" so that it can run on your target system.
> i have never really had any problems (but i used some "tricks" (actually 
>   it was just decoupling calculations with [del]) in the days of 
> P3-800MHz machines in order to distribute the message load a bit over time)
> > (In particular I have to multiplicate inputs for a matrix in order to obtain outputs that are parameters of input for a sound synthetizer...).
> i don't see any particular strict requirement for efficiency in here.
> what sizes of matrices do you expect? 1000x1000 or just 30x26?
> which calculations do you need? just multiplication of eigenvalue 
> decomposition (not that this was implemented)?
> mfg.asdr.
> IOhannes

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