how to write a complex transfer function

how should i write followinG transfer function (tf) in the form of nuemrator and denominator in MATAB

-10.45 s^3 - 10.53 s^2 - 0.2246s

-----------------------------------------

s^2 + 1.2116 s - 0.1087 - 0.0909i

following is not working as it returns S^3 in the denominator, but i need s^2 in denominator :

numerator = [-10.45 -10.53 -.2246 0];

denominator = [0 1 1.2116 -.1087 -.0909j];

sys = tf(numerator,denominator);

Answer 1

[Sam Chak]

Ensure no space in .

numerator   = [-10.45 -10.53 -.2246 0]; 
denominator = [0 1 1.2116 -.1087-.0909j]; 
sys         = tf(numerator, denominator)

Warning: The numerator or denominator of this transfer function has complex-valued coefficients.

sys =
 
  -10.45 s^3 - 10.53 s^2 - 0.2246 s
  ---------------------------------
  s^2 + 1.212 s - (0.1087+0.0909i)
 
Continuous-time transfer function.

[John]

Thanks, it worked

[Paul]

Or use commas to separate the array elements, then no need to worry about spacing

numerator   = [-10.45 , -10.53 ,   -.2246 0]; 
denominator = [0 , 1 , 1.2116 , -.1087   -   .0909j]; 
sys         = tf(numerator, denominator)

Warning: The numerator or denominator of this transfer function has complex-valued coefficients.

sys =
 
  -10.45 s^3 - 10.53 s^2 - 0.2246 s
  ---------------------------------
  s^2 + 1.212 s - (0.1087+0.0909i)
 
Continuous-time transfer function.