Hi Mr Edu, I want to generate n symbolic variables according to the value of n, for a similar output: x1, x2, x3, ... xn. In matlab I got it easy with the command V = sym('x', [1 n]); syms(V) ; but in octave it generates x11, x12, x1n and the syms(V) command doesn't work. I want to program a modified raphson newton for any nonlinear systems of equations where I input the equations with the variables x1,x2,x3,...xn.