[Octave-bug-tracker] [bug #63791] movmean - out of memory or dimension too large for index type

[Dmitri A. Sergatskov]

Follow-up Comment #13, bug #63791 (project octave):

I still do not understan why I cannot reproduce this on any of my computers. I
just tried it on coreduo win 7 laptop w/ 8GB of ram
and it finished after 6 minutes w/o any problems.

On more practical note, you can approximate movmean with 
filter (or do even better with filtfilt from signal package):


octave:1> a= rand(1e6,1);
octave:2> N = 513;
octave:3> tic; b = movmean(a, N); toc
Elapsed time is 2.4628 seconds.
octave:4> tic; c = filter(ones(1,N)/N, 1, a); toc
Elapsed time is 0.201769 seconds.
octave:5> pkg load signal
octave:6> tic; d = filtfilt(ones(1,N)/N, 1, a); toc
Elapsed time is 0.740603 seconds.


First ~N points will be off. 

Dmitri.
-- 

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