Unable to use a value of type tf as an index. How to fix?

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Rohan Gulur
Rohan Gulur 2024-1-3
评论： Rohan Gulur 2024-1-3
num=[(-number1),(number2)];
den=[(number3), (number4))];
sys1 = tf(num, den);
fb = bandwidth(sys1)
Having issues when running this saying that I am unavailable to use value of TF as an index. Any suggestions to fix this?

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采纳的回答

Walter Roberson
Walter Roberson 2024-1-3
You will find that bandwidth is a variable but that you are trying to use it as a function call.
  2 个评论
Steven Lord
Steven Lord 2024-1-3
Rename the variable you've created that's named bandwidth to something else. While that variable exists in the workspace you will be unable to call the bandwidth function.

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更多回答（1 个）

Ayush
Ayush 2024-1-3
Hi @Rohan Gulur
The error message "Unable to use a value of type tf as an index" suggests that there is a syntax error in the code. It seems like there is an extra parenthesis in the den array definition which is causing the problem.
You can try this code:
number1 = ...; % Your value for number1
number2 = ...; % Your value for number2
number3 = ...; % Your value for number3
number4 = ...; % Your value for number4
num = [-number1, number2];
den = [number3, number4];
sys1 = tf(num, den);
fb = bandwidth(sys1);
Thanks,
Ayush

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