Function not using given Variables

I'm trying to solve a system of 6 non linear equations using Newton Raphson Method. I defined my equations with 6 inputs (given as initial guesses) and the function returns value after solving it with the inputs.

Then, while trying to calculate Jacobians,

W=jacobian([f(1),f(2),f(3),f(4),f(5),f(6)],[theta,phi,omega,V,alpha1,beta1]);

Jacobian is evaluated and I get the partial derivatives accordingly.

But when I tried calling a function that calculates Jacobian W, with my initial guess. It does not give me a value, rather the partial derivative itself.

function X=jaccalc(input,W);

theta=input(1)
 phi=input(2)
 omega=input(3);
  V=input(4);
  alpha1=input(5);
  beta1=input(6);
% other variables were also defined
for i=1:6
X(i)=W(i); %I tried assigning a matrix X in hopes that it would calculate the value with the inputs.
end
end

Kindly help me out. And any advice on making the code efficient is also much appreciated

Answer 1

[Stephen23]

You will need to use subs:

https://www.mathworks.com/help/symbolic/subs.html

The loop is superfluous.

[Sai Sabarish M]

Thank you Stepehen, that did work. But I'm getting values that arent decimals, rather a combination of two huge numbers, when divided gives the numerical value.

-23005294093609302249/14411518807585587200  , (9*pi)/10 - (97*cos(10)^2)/250  

Thank you for prompt reply again.

[Walter Roberson]

That is your jacobian. Decimal would only be an approximation of the jacobian. But if you really want that then double() the answer you are getting .