MATLAB: Error with Matlab Function

error

I got this error :

Output argument "AB" (and maybe others) not assigned during call to

I would be greatly appreciated for your assistance,

You wrote a function with the variable name in the definition line but never assigned a RHS to it.

SOTOO

function ab = yourfunctionname(x)
  % does what it does
    z=x.^1.5;
  end

As is easily seen, ab is never defined. ( z should have been ab or vice versa). Fix the similar problem appropriately in your function.

Do change

C1=[1 0 -(n_zx*(alpha_x+beta_x*S)*((z)/(z_x))^(-1+n_zx)/(1+S+(z/z_x)))];

In the following x is not define, you trying to access x as array

C2=[1 0 (x(2)/y_z)^n_yz-delta_z*x(3)];
%........^.......................^....

In the intial line

syms z y z
%....^...^ same ...is it x?

Remove the z=x^2 from the loop.

syms x n y z a;
n= 5
z=x^2;
for y=1:n
 
 z=int(z)
 
end