Error from xcorr

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?

Answer 1

[Wayne King]

Try the updated version of fftfilt.m available here:

http://www.mathworks.com/support/bugreports/640328

This was fixed in R2011a

Wayne