Re: Need help filtering 24 million element vector...

[Doug Stewart]

On Fri, Oct 18, 2019 at 2:43 PM Brian Kaczynski <address@hidden> wrote:

Doug,

I already solved it.  I broke the input into four equal pieces, filtered them individually, and stitched the outputs back together.

It wasn't too bad because the input was a square wave so it had long periods with no change.

Thanks!
-Brian

Just for the record, this ran ok on my machine.

in1=rand(1,25e6);
b1=rand(1,2047);
y=filter(b1,1,in1);

 

On Fri, Oct 18, 2019 at 2:37 PM Doug Stewart <address@hidden> wrote:

On Fri, Oct 18, 2019 at 1:28 PM Brian Kaczynski <address@hidden> wrote:

Hello,

I have an input vector 24.576e6 elements long which I want to filter with an FIR filter with 2047 taps.  When I try to do:

y = filter(b,1,in);

Octave reports "error: out of memory or dimension too large for Octave's index type."

It doesn't seem like this should be too large...  Does anyone have a good idea how to compute this filter?

Thanks!
-Brian

Tell us more about your setup.

What os

how much memory.

--

DAS

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DAS