How to declare variables equal to the number of variables entered by the operator

I am developing a code for Newton's method for non-linear equations. I intend to take an input of no. of eq's from the user and declare variables equal to the number of equations e.g. No. of eq = 3 then syms x1,x2,x3 or x,y,z. Also, I can't store the equations in a column vector and take the jacobian. I also am unable to evaluate the functions and jacobian at a set of coordinates.I have developed a starting for 2 eq's.

syms x y  clear f1 f2
 f1=input('Enter First eq:','s');
 f2=input('Enter second eq:','s');
 X=[0 0];
  f1=4*x^2-20*x+1/4*(y^2)+8;
  f2=1/2*(x*y^2)+2*x-5*y+8;
j1=jacobian([f1],[x y]);
 j2=jacobian([f2],[x y]);
 f1=inline(f1,'x','y');
 f2=inline(f2,'x','y');
 c1=f1(X(1),X(2));
 c2=f2(X(1),X(2));
  F=[c1 c2]'
 j1=inline(j1,'x','y');
 j2=inline(j2,'x','y');
 c=j1(X(1),X(2));
 d=j2(X(1),X(2));
 J=[c;d]

Please help me to modify this code for any number of equations entered by the user.

Answer 1

[Matt J]

I intend to take an input of no. of eq's from the user and declare variables equal to the number of equations

No, don't do this. Stick with the approach we've been discussing in your similar post

http://www.mathworks.com/matlabcentral/answers/161481-i-can-t-take-several-non-linear-inputs-and-assign-them-names-for-using-later-in-the-code

Instead of having separate f1,f2, etc... develop a single vector-valued symbolic function f. Then you can apply jacobian, gradient, etc... to f with matrix/vector semantics.