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Possible Duplicate:
How do I do numerical integration of a vector in MATLAB?
I have an x-y dataset (see figure) but I don’t have the fundamental function of the data, so I can’t use symbolic integration. Is there an easy way to integrate the curve numerically?
The only way I can think of is a for loop over evey y-value times the delta x between two points next to each other? Are there other ways to do it?
You should be looking at an integration scheme like Runge-Kutta or Burlish-Stoer. You’ll want something that uses a variable increment so you can use a larger step where the function is flat and a smaller one to capture those peaks.