Error from xcorr

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David Craig
David Craig le 26 Sep 2011
Hi, I'm trying to correlate a sample from one signal to another signal using the xcorr function as so,
xcorr(VAL_DF(i1:i2),CAR_DF);
but it gives me the following error,
??? Error using ==> fftfilt at 78 Filters of length greater than 2^20 are not supported. Use dfilt.fftfir instead.
Error in ==> xcorr>vectorXcorr at 127 pos_c = flipud(fftfilt(conj(y),flipud(x))); % positive lags
Error in ==> xcorr at 54 [c,M,N] = vectorXcorr(x,autoFlag,varargin{:});
Can ayone tell me what s going on?

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Wayne King
Wayne King le 26 Sep 2011
Try the updated version of fftfilt.m available here:
http://www.mathworks.com/support/bugreports/640328
This was fixed in R2011a
Wayne

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