Numerical Integration of Data Set

#1 Posted: 3/22/2017 5:22:47 AM

13 likes in 74 posts.

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Is there an easy way to integrate a data set using the trapezoid rule, like the "trapz" function in matlab?
Also is there an easy way to find the centroid of this area?

I've attached a sample data set.

integration array.sm (3 KiB) downloaded 78 time(s).

#2 Posted: 3/22/2017 7:55:36 AM

Davide Carpi

1416 likes in 2873 posts.

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geometric solution

integration array.sm (11 KiB) downloaded 150 time(s).

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Ernesto 3/23/2017 9:18:00 PM

#3 Posted: 3/22/2017 1:14:35 PM

Ernesto

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That's perfect!!

Thanks for your help!

#4 Posted: 3/22/2017 1:18:39 PM

Вячеслав Мезенцев

1402 likes in 1708 posts.

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or I can add original "trapz" function to the matlab plugin if you really need this.

Russia ☭ forever, Viacheslav N. Mezentsev

#5 Posted: 3/22/2017 1:22:56 PM

Ernesto

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Thanks but this is more than sufficient for my needs.

Regards.

#6 Posted: 3/22/2017 3:12:56 PM

Jean Giraud

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Ernesto,

Your data set is not impressive. As is: it represents no physical phenomenon.
The way I see it is otherwise ... it looks the linear junctions can only
represent derivatives of quadratic. It suggests a polynomial fit [offered].
Is it a piece of wood ? the fence around the yard ?

Jean

integration array [option].sm (22 KiB) downloaded 62 time(s).

#7 Posted: 3/22/2017 3:29:50 PM

Ernesto

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@Jean

It is horizontal soil pressure vs depth

#8 Posted: 3/23/2017 10:29:54 AM

Jean Giraud

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Wrote
@Jean

It is horizontal soil pressure vs depth

Thanks Ernesto, interesting.

You can complete and export your project,
in red at the end of the WS.

Jean

Polynomial fit QUARTIC Option.sm (26 KiB) downloaded 65 time(s).

SMath

Numerical Integration of Data Set

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Numerical Integration of Data Set - Numerical Integration of Data Set - Messages