Re: [boost] [Accumulators]multiple statistic instances

From: Eric Niebler (eric_at_[hidden])
Date: 2007-08-02 11:29:35

Hugo Duncan wrote:
> I am trying to create an IIR filter (see e.g.,  
> http://en.wikipedia.org/wiki/IIR) using the delay buffer implementation  
> recently discussed.
> 
> To do this I need two delay buffers for my filter, one for the samples and  
> one for the computed outputs.
> 
> I have tried templating my delay buffer with a discrimating type, but I  
> can't get more than one buffer instantiated.  ie the following creates  
> only one buffer instantation.
> 
>      accumulator_set<int, stats<
>           tag::delay<>,
>           tag::delay<my_other_delay> > > acc(
>        tag::delay<>::cache_size = 3,
>        tag::delay<my_other_delay>::cache_size = 4
>      );
> 
> Is this worth perservering with? any hints? or would it be better to wait  
> for the next version of accumulators?

That should work. But you'll have to send me your code before I can 
figure out what's going on. Try to make it as small as possible.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com
The Astoria Seminar ==> http://www.astoriaseminar.com