MATLAB: How to extract numerator and denominator as polynomials from a transfer function

dynamic systemnumerator and denominatortftransfert function

I'm am having some stupid trouble with transfer functions.

If I have to write the tf:

              s^2 + 2 s
G(s) =  ---------------------
        s^3 - 2 s^2 + 4 s + 1

I could write: G=tf([2 1 0],[1 -2 4 1])

But now, I would like to extract numerator and denominator as array. If I write: [Num, Den]=tfdata(G) the programm gives me them as cells

Num =

cell
    [1×4 double]

Den =

cell
    [1×4 double]

How can I take numerator and denominator as arrays? I would like to receive

Num =

    [2 1 0]

Den =

    [1 -2 4 1]

Thank you

Just do this:

G = tf([2 1 0],[1 -2 4 1]);
[num den] = tfdata(G, 'v');
num =
     0     2     1     0
den =
     1    -2     4     1

s = tf('s')
G = (s+2)/(s*(s-1)*(s+6)^2)

This gives a transfer function (tf) with the polynomials expanded

G =
             s + 2
  ----------------------------
  s^4 + 11 s^3 + 24 s^2 - 36 s

Or you can express it as a ZPK (zero-pole-gain)

G = zpk((s+2)/(s*(s-1)*(s+6)^2))

Then you get

G =
       (s+2)
  ---------------
  s (s+6)^2 (s-1)

Never mind I figured it out, but to those who want to know:

sys = tf([1 0],[1 2 3])
[Num,Den] = tfdata(sys);
sys_syms = poly2sym(cell2mat(Num),s)/poly2sym(cell2mat(Den),s)

Credit goes to: