How to write a function that takes an interval [a,b] and a function f(x) and computes the integral of f(x) from a to b using the Trapezium rule.

How to write a function that takes an interval [a,b] and a function f(x) and computes the integral of f(x) from a to b using the Trapezium rule? Then, how do I use it on f(x)=sin(x) with [a,b]=[0,pi/2]?

Answer 1

[Mathieu NOE]

hello

refer to trapz and cumtrapz functions

example below

a = 0;
b = pi/2;
x = linspace(a,b,100);
y =sin(x);
out_integral = trapz(x,y);