getting the error in solving non linear equations

This is the error i am getting , i didnt understand what that error means . The error is showing in S(i)=vpasolve([eqn1,eqn2],[N,J]);

can u help me

Error using sym.getEqnsVars>checkVariables (line 92)

Second argument must be a vector of symbolic variables.

Error in sym.getEqnsVars (line 56)

checkVariables(vars);

Error in sym/vpasolve (line 132)

[eqns,vars] = sym.getEqnsVars(varargin{1:N});

Error in Untitled (line 46)

Solutions{i}=vpasolve([eqn1,eqn2],[N,J]);

Answer 1

[KSSV]

You have to show us the full code to get a straight help. Without ocde it gets difficult for people to understand what exactly is the problem.

I suspect that, in this line:

Solutions{i}=vpasolve([eqn1,eqn2],[N,J]);

is N, J are symbolic variables? I think not in your case and this is the reason for your error. N, J should be symbolic variables which you are truing to solve in eqn1 and eqn2.

If this is not the case, show us your full code.

Answer 2

[sunitha]

Now i am not getting any error but i am getting the wrong values.i dont know where i did mistake using the data first i have to find V value using that V value again i have to find out the N J values

The first code is to find the v value

The second code is to find the N J variables

The problem is i am getting the same value 4 even if change the another variables also i am getting the same result

can u please tell me what is the problem with this code? i am trying from the last two days