Can't write transfer function properly.

2022 2 26
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更新时间：2022 2 27
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Hello everyone , need help about writing a transfer function . I know how we normally write the code for it but know i'm not able do it correctly.Always getting different errors

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Star Strider
Star Strider 2022-2-26

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MATLAB does not recognise implicit multiplication.
Be sure to include multiplication operators (*) when you code ‘G’ just after your initial tf call.

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Walter Roberson
Walter Roberson 2022-2-26
Hint:
s = tf('s')
and after that you can just code the expression, making sure to use * for multiplication
Ahmet Cavit Dastan
Ahmet Cavit Dastan 2022-2-26
thank you but still getting different errors ,even with trying sys(s) instead of G(s) , can you check it ?
  1. sys(s)= (s^2+3s+10)(s+5)/(s+3)(s+4)(s^2+5*s+100)
  2. s = tf ('s')
Walter Roberson
Walter Roberson 2022-2-26
编辑：Walter Roberson 2022-2-27
Ran in:
Ran in:
s = tf('s')
s = s Continuous-time transfer function.
sys = ((s^2+3*s+10)*(s+5)) /((s+3)*(s+4)*(s^2+5*s+100))
sys = s^3 + 8 s^2 + 25 s + 50 ------------------------------------- s^4 + 12 s^3 + 147 s^2 + 760 s + 1200 Continuous-time transfer function.

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