I need help using the quad function

Question

Bob 2014-12-14

回答： Star Strider 2014-12-14

When using the quad function to integrate, I am getting the error:

FUN must be a function, a valid string expression, or an inline function object.

I am trying to integrate the polyval.

Here is my code. How do I fix it to integrate the function and avoid this error message?

function [ A ] = func( x )

clear all clc

A=5;

B=25;

x=[0 10];

y=[A B];

p=polyfit(x,y,1);

func=polyval(p,x);

q=quad(func,0,10)

end

Answer 1

Star Strider 2014-12-14

To integrate a vector (or matrix in one of its dimensions), use the trapz function. The quad, integral, and related functions integrate functions.