Transfer function 'tf'
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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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Walter Roberson
2016-2-16
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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