Integration of numerical data

6 vues (au cours des 30 derniers jours)
Emil Frøen
Emil Frøen le 26 Mai 2019
Commenté : Abdul Basith Ashraf le 31 Août 2020
I have a set of numerical data stored in a vector D, and a second vector of positions z, of equal length.
If i wish to calculate the integral shown in the picture, how would this be done?
Equation.png

Connectez-vous pour répondre à cette question.

Réponses (2)

John D'Errico
John D'Errico le 27 Mai 2019
Multiply the two vectors. Then call trapz.
Star Strider
Star Strider le 27 Mai 2019
For vectors of data, the best option would be the trapz (link) or the related cumtrapz functions, depending on the result you want.
  1 commentaire
Abdul Basith Ashraf
Abdul Basith Ashraf le 31 Août 2020
I have not so regular data (x and y are returned from ode45).
How can I visualize the rectangles under the curve to see how good trapz is doing?

Connectez-vous pour commenter.

Catégories

En savoir plus sur Numerical Integration and Differentiation dans Help Center et File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by