How to calculate the area under curve?

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AS
AS 2021-5-27
评论： AS 2021-5-31
I have attached a curve in which x axis is time and y axis is amplitude. How to calculate the area under this curve.Please suggest me.

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Torsten
Torsten 2021-5-27
area_under_curve= trapz(x,y)
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Torsten
Torsten 2021-5-28
编辑：Torsten 2021-5-28
If the spacings between the x-values is 1, you can use trapz(y), else you must use trapz(x,y).
The fact that the two results are different indicates that the spacing is different from 1 in your case.

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