Warning: Input argument might be unused and value assigned might be unused

I got a problem with my code, im trying to do a Fourier series function, but when i instance the function (y) says that might be unused and i dont undertand why.

Also, that happens to my result (s), when i put (s) as a "syms" says that might be unused

function [s]=FourierNuevo(y,T,B,max)

syms x n y s

p=(T-B)/2;

A0=(1/p)*int(y,[-p p]);

an=(1/p)*int(y*cos(pi*n*x/p),[-p p]);

bn=(1/p)*int(y*sin(pi*n*x/p),[-p p]);

As=an*cos(pi*n*x/p)+bn*sin(pi*n*x/p);

s = A0/2 ;

for k=1:max

s=s+subs(As,n,k);

end

end

This is my code. When i run it (y) is used like a constant value. Not like a function

Answer 1

[Setsuna Yuuki.]

Holas.

Quizás es porque tu función

function [s]=FourierNuevo(y,T,B,max) 

recibe la variable y, pero despues la estas reemplazando ya que declaras nuevamente y como tipo syms.

syms x n y s

Hello.

Maybe it's because your function

function [s]=FourierNew(y,T,B,max)

receives the variable y, but then you are replacing it since you declare again y as type syms.

syms x n y s