How to integrate discrete data by Gaussian quadrature method

Hello,

I'm trying to numerically integrate discrete data by Gaussian quadrature method. The file attached "test.mat" is a discrete data set taken from a finite-element mode solver and has the following variables.

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x, y : Coordinates of each node

nodes : Node of each triangular element

normE : Electric field distribution

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How can I apply Gaussian quadrature method to the data set attached to calculate the area integration below?

Answer 1

[José-Luis]

integral2()

[José-Luis]

Did you change your question?

quad2d()