Cross Correlation to determine Delay

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Samuel on 2 Jun 2023
Commented: Tim on 2 Jun 2023
I have 2 signals of equal length. The signals correlate but with a time delay. I thought of doing a cross-correlation between both signals to determine the lag at which both signals have the maximum correlation. I've written the following line of code to do that.
Plotting both signals and their cross-correlation returns this.
I was expecting to see a peak at approx. positive or negative 10 because that's when both signals drop significantly. I can't seem to figure out why that isn't the case. Is it because both signals have the same length?
Any help would be very much appreciated!

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