Hi, 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@iem.at

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

lucaturchet1982@libero.it wrote:

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Are there some pd-libraries that implements matrix objects?

so you found them already...

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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)

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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)

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(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