tf is not working .

R=470;

L=100*10^-3

C=0.22*10^-6

L =

0.1000

C =

2.2000e-07

num=[1/(R*C) 0]

num =

1.0e+03 *

9.6712 0

>> den=[1 1/(R*C) 1/(L*C)]

den =

1.0e+07 *

0.0000 0.0010 4.5455

>> T=tf(num, den)

'tf' requires one of the following:

Control System Toolbox

DSP System Toolbox

Model Predictive Control Toolbox

RF Toolbox

Signal Processing Toolbox

Answer 1

[Star Strider]

License and install the Control System Toolbox and the code should work.

R=470;
L=100E-3;
C=0.22E-6;
L = 0.1000;
C = 2.2000e-07;
num=[1/(R*C) 0]

num = 1×2

1.0e+03 * 9.6712 0

den=[1 1/(R*C) 1/(L*C)]

den = 1×3

1.0e+07 * 0.0000 0.0010 4.5455

T=tf(num, den)

T =
 
          9671 s
  -----------------------
  s^2 + 9671 s + 4.545e07
 
Continuous-time transfer function.

figure
bodeplot(T)

.