Measure similarity between signals for pattern matching and analysis. Cross-Correlation $$ (x \star y)[n] = \sum_{k=-\infty}^{\infty} x[k] y[n + k] $$ Auto-Correlation $$ R_{xx}[n] = (x \star x)[n] = \sum_{k=-\infty}^{\infty} x[k] x[n + k] $$ Implementation 1import numpy as np 2 3# Cross-correlation 4corr = …