Web Reference: numpy.correlate may perform slowly in large arrays (i.e. n = 1e5) because it does not use the FFT to compute the convolution; in that case, scipy.signal.correlate might be preferable. Jul 31, 2015 · I have a large number of cross-correlations to calculate and I'm looking for the fastest way to do it. I'm assuming vectorizing the problem would help rather than doing it with loops Let's see how to perform cross-correlation in NumPy, a method for measuring the similarity or relationship between two sequences of data as one is shifted in relation to the other.
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