Transfer function 'tf'

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Aurore Lecharlier 2016-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/268460-transfer-function-tf

评论： Jerry Maravilla 2021-9-27

Hi, in Matlab R2015b, I used the commando ' tf ' for the transfer function. When I run the script where I used it, I get an error message ' undefined function or variable 'tf' '. How do we get or create this function 'tf' ? I thought it was an inherent function of matlab. Thank you.

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采纳的回答

Walter Roberson 2016-2-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/268460-transfer-function-tf#answer_210060

http://www.mathworks.com/help/control/ref/tf.html Control System Toolbox

http://www.mathworks.com/help/signal/ref/tf.html Signal Processing Toolbox

http://www.mathworks.com/help/mpc/ref/tf.html Model Predictive Control Toolbox

You need one of those three.

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Akella Kartik 2021-9-22

I have the isseu in 2021a as well. I installed both Signal Processing Toolbox and the DSP System Toolbox, but still I get this:

Unrecognized function or variable 'tf'. for tf and

'tf' not found. for which tf

Jerry Maravilla 2021-9-27

Try the control system tool box. If that doesn't work you can just use matlab's online editor. Doesn't fix the issue but you'll be able to run your code.

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