How to add trendline

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Buket Sahin
Buket Sahin on 7 Dec 2021
Answered: Star Strider on 7 Dec 2021
I have a graph like below.
How can I add a trendline line to it, like a trendline black stripe in the below figure?

Answers (2)

_
_ on 7 Dec 2021
Look into movmean.

Star Strider
Star Strider on 7 Dec 2021
There are any number of approaches, including lowpass filters of various descriptions.
Another one would be polyfit and polyval, perhaps with a degree 4 polynomial.
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