The point of cross-correlation is to determine if two signals are similar or not
In other words, prior to having made the determination, the OP is perfectly correct in saying "two series", because at that point in time he doesn't know if they are related. That's why he is running the cross-correlation.
So, you are agreeing with me. Thanks.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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I can not agree with you because what you are saying is obviously not correct. The two series (signals, functions) are not the same, they are defined as two different entities.
For example, lets consider that you would like to know if the earthquake activity is correlating or not with the earth tides. You will run a cross-correlation analysis between these two series (supposing you have such data). If they correlate you may conclude that earthquakes might be triggered (in some situations) by earth tides. But again, the tides and earthquakes are different things!
Have a nice day.
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