How do i get this script to work correctly

Given the function y=sin(x), for n=10,100,1000,10000 estimate: 1. the area under the curve in the interval [0,pi/2]. Compute for each n, the US, LS from the estimation Max error of each n Make a table with the values of n and max errors, or between delta and max errors.

My script thus far is: f=inline('sin(x)')

a=0 b=pi/2 n=[10 100 1000 10000]

deltaX=(b-a)./n;

xu=linspace(a,b-deltaX,n);

xl=linspace(a+deltaX,b,n);

US=deltaX.*sum(f(xu)); LS=deltaX.*sum(f(xl));

Estimate=(US+LS)./2 error=(US-LS)./2

But i get this "error: C2L1P2.m: product: nonconformant arguments (op1 is 1x4, op2 is 1x10) error: called from: error: /home/oo/C2L1P2.m at line 13, column 3"

Answer 1

[Star Strider]

First, you do not need the inline call (that is incorrect anyway because you do not specify that the argument to it should be ‘x’). So just use a direct call to sin(x).

Unless this is a homework assignment and you are restricted in the functions you can use (that we need to know if you want our hints), I would use the trapz or cumtrapz function if you have to calculate the vector first, or the integral function if you can use the functions directly.

[ky win]

Thank you, this is a homework problem, and im pretty sure they do not want me using the easy methods until after they show it to us.