Can I use simpson's 1/3 rule to calculate area under graph for imported data?

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Natalia Wong 2015-12-23

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https://ww2.mathworks.cn/matlabcentral/answers/261428-can-i-use-simpson-s-1-3-rule-to-calculate-area-under-graph-for-imported-data

Hi I have written a function (Composite Simpson's 1/3 rule) and I need to use the function to integrate to get the area under the curve by using two sets of data ( x-axis and y-axis). How do I do it? If so, then what should my function, and upper limit and lower limit be?

Thanks I'm new to matlab