Simulink transfer function with sinusoidal parameter

Hi

I need to design a transfer function in the following form: K/ (Ts + 1) where the numerator K is scalar and varies sinusoidal

I tried adding and event listener on the start callback

iev = add_exec_event_listener('main\le_block','PostOutputs', @vary_me)

the vary_me function looks like:

function vary_me

a=evaluatevars('tout');
a=a(end);
a=sin(a);
set_param('main/le_block','Numerator',num2str ( sin(a) ) );

I noticed the following error

Warning: Error occurred while evaluating listener callback. 
Error using vary_me
Too many input arguments.

How should I solve this issue? Is there any easier way to implement the same behavior (sinusoidal-varying numerator of transfer function) ?

Thanks for any reply

Answer 1

[Azzi Abdelmalek]

You can multiply your transfer function by sin(t)

Answer 2

[River Rock]

Your answer does solve the initial problem.

Now how about modifying the parameters of the denominator?

[Azzi Abdelmalek]

That was not your question!

[Azzi Abdelmalek]

You can post another question if you want. And I don't understand, what means Now how about...

[River Rock]

Very well then, I will create a new topic.