Not enough input arguments error in matlab

This is my matlab code , I got Not enough input argument error in line 2 and i don't know how to fix it. Anyhelp ? Thanks in advance.

function [] = Integr1( F,a,b )
i = ((b - a)/500);
x = a;k = 0; n = 0;
while x <= b
    F1 = F(x);
    x = x + i;
    F2 = F(x);
   m = ((F1+F2)*i)/2;
    k = k +m;
end
k
x = a; e = 0; o = 0;
while x <= (b - 2*i)
    x = x + i;
    e = e + F(x);
    x = x + i;
    o = o + F(x);
end
n = (i/3)*(F(a) + F(b) + 2*o + 4*e)

[Image Analyst]

You forgot to give us the error message. You snipped out just a small, almost worthless, part of it. Please copy and paste the ENTIRE error message - that means ALL THE RED TEXT , not just some of it.

Answer 1

[Star Strider]

I ran the essence of your code (I didn’t run it as a function) and it ran for me without error.

Check the way you called your function.

[Meme]

would you please tell me exactly the inputs you used when calling the function in the command window and how did you call it exactly. Sorry i am new to matlab and thank you very much for your answer.

[Star Strider]

I didn’t actually call your function because I didn’t want to create (and then delete) another function file.

I used:

F = @(x) sin(x).^2;
a =    0;
b = 2*pi;

I would call it as:

Integr1( F,a,b )

You’re not returning anything from your function, so it will just print out ‘k’ and ‘n’ to the Command Window.

[Meme]

thank you much for your help

[Star Strider]

My pleasure.