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Is there any heuristic method to find metrics, similarities between two signals? I am not talking about correlation.

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    $\begingroup$ Correlation reveals the linear relationship between two signals. Since you already excluded correlation, what relationship are you then looking for? $\endgroup$ Commented Nov 21, 2021 at 20:06
  • $\begingroup$ Correlation is a waveform based similarity measure between signals. And it's very a low level comparison. However, depending on the signal type and application domains, there are different (high-level) interpretations of the term similar as well. For example, topological similarities are computed during object-image recognition tasks... Such as morphological similarity between a base object and its morphed versions. $\endgroup$
    – Fat32
    Commented Nov 21, 2021 at 20:46
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    $\begingroup$ Does this answer your question? Comparing multiple signals for similarity $\endgroup$ Commented Nov 21, 2021 at 22:25
  • $\begingroup$ @DanBoschen I am looking for measuring the total amplitude, time-shifts, and waveform differences. $\endgroup$
    – Blobmou
    Commented Nov 22, 2021 at 8:53
  • $\begingroup$ @Blobmou what you describe is a correlation. No matter how little you like that. $\endgroup$ Commented Nov 22, 2021 at 10:33

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