Numerical integration with data-points

This program calculates a numerical integration by the Simpson's 1/3-Rule, Trapezoidal Rule and Composite Trapezoidal Rule from datapoints.

This program came from own needs to quickly calculate the numerical integration of several x-values with its belonging function values by the Simpson's 1/3-Rule, Trapezoidal Rule and Composite Trapezoidal Rule.

The only required inputs from the user is at line 2 and 3, where the user will have to insert the datapoints. For example:

1. % DATA input:
2. x=[1,2,3];
3. y=[2,2,3];

... This method is faster than having to using an online calculator where you have to wait several seconds before you can see the answer. :)