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Area under a shape?

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Niklas Kurz
Niklas Kurz on 18 Jul 2020
Commented: Niklas Kurz on 19 Jul 2020
Hello, I'd really like to know how to calculate the area beneath a shape like this:
So from the outer borders to x-axis. Since the values are repeating I reckon trapz() doesn't work.

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KSSV
KSSV on 18 Jul 2020
Read about polyarea, convhull.
convhull gives you coordinates of the points which defines your shape, with these corodinates youc an use polyarea.

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KSSV
KSSV on 18 Jul 2020

Pick the curve you want to find area under and use trapz.

Niklas Kurz
Niklas Kurz on 19 Jul 2020
I thought there'd be a more elegant solution like with
area(Yp,Xp)
I can cast the shadow of the shape, but nothing more.
Well, I keep it simple and extract a curve manually as u advised. This works at the least.
Niklas Kurz
Niklas Kurz on 19 Jul 2020
If u need some inspiration: This User has answered the question sophisticatedly:
https://de.mathworks.com/matlabcentral/answers/565277-how-to-apply-a-fit-on-this-shape?

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