How do I do numerical integration of a vector in MATLAB?

Question

I have a vector of 358 numbers. I\'d like to make a numerical integration of this vector, but I don\'t know the function of this one.

I found that we can use trapz o

Answer 1

Think about integration as to find area under the curve, which is formed by your vector. Well it's not actually a curve, but polygonal chain. What TRAPZ function is doing, it finds sum of areas of each trapezoids formed by every two neighbor points in your vector and their projection on X axis. See the function documentation, if you have uneven distance between your points or if distance not equal one.

You can read more about this method, for example, on Wikipedia.