Hi, I am trying to run a simulation with a while loop which modifies the content of a 3 * 1 matrix in every iteration. But it is displaying this error

??? Error using ==> mupadmex
Error in MuPAD command: Illegal operand [_index]
Error in ==> sym.plus at 14
    X = mupadmex('symobj::zip',A.s,B.s,'_plus');

Error in ==> project at 37
    n1 = n1 + dn1;

Here dn1 is the correctifying 3*1 matrix that i am adding to n1(3*1) in every iteration. Please suggest something!

[David Sanchez]

I would suggest to write your code so it can be read.

[Sushant Kumar]

Actually, i have got rid of that error....the new problem is to find a sym function in matlab 2012b. Is there any alternate function which serves the same purpose and can be found in matlab 2012b? AS the last option, can anyone tell me how to construct my own sym function?

[Walter Roberson]

Answered in the other thread you posted in http://www.mathworks.co.uk/matlabcentral/answers/76837-is-there-an-alternate-for-sym-function-in-matlab-2012b