[PD] cross-correlation in pd ?

[Charles Henry]

Alright.... here is my last version of the patches.  Even if no one
else is interested, I consider the problem solved at this point.
Whenever the calculations are reset, there is a brief transient.
digression:
That's because I can't find a way to precisely calculate a signal
which represents the sum of squares of s1, as follows:
output(k)=sum(i= -32+k:31+k; s1(i)^2) for k=-32:31
in the same block as sxcov~
(I tried to do that first, but no easy solution came up, so I chose
something simpler, if only a little less accurate)

anyway, each of the patches from previous posts have been modified and
corrected.  Hopefully, this method gives you the most flexibility for
computing sxcov~ and sxcorr~ in real time with abstractions.

Chuck


On 6/20/07, Charles Henry <czhenry at gmail.com> wrote:
> > This one works within block sizes of 64, by using an [block~ 128 2] .
>
> Now, I've got one where you add an argument and use arbitrary block
> sizes.  It's much more useful, this way.
> [sxcov~ 2048] works within a blocksize of 2048, and calculates the
> symmetric cross covariance of two signals.
>
> Still having aggravating time, trying to normalize by the proper
> calculation of variance on each signal.  It might be a while before I
> get it together.
>
> Chuck
>
>
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