Re: help me for work with Octave

>
> The 'tf' function belongs to the control package from Octave Forge which
> you have installed but not loaded.  To load the package, run 'pkg load
> control' from the Octave prompt.
>

The message tells you how to fix your problem.  Octave packages are not
loaded by default because some can change otherwise expected octave
behavior.  So you must load the package first.

pkg load control

will load the package and let you run the tf function.

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