how to calculate absolute value for a tf-object for a certain frequency

how to calculate absolute value for a tf-object for a certain frequency.

i.e. I have a transfer function object, tf. I would like to calculate the absolute value and the angle of the transfer function for a certain frequency.

Anders

Answer 1

[Star Strider]

Thje evalfr (link) function is likely what you want.

It requires a complex radian frequency for the frequency argument, so for example 100 Hz would be 2*pi*1j*100. You can get the magnitude of the complex output with the abs function, and the radian phase angle with the angle function.

[Anders Hultgren]

Thank you Star Strider,

Your suggestion solved my problem.

[Star Strider]

My pleasure.

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