How to change the gain with time using Simulink?

[trashbox]

Hi all,
When using the Gain block which are from simulink library->Math Operations and the gain value only can be set with a constant, I want to program the gain.For examplpe,I want to make the gain changed with time.How to make it?
Thank you very much!

 

[brmadhukar]

Re: simulink help!

Hi,
use a function that can be called from Simulink. The input parameter is time. In the function you may change the gain depending on time.
brmadhukar