problem about block choose in simulink

Hi

I am having trouble of the block choose in simulink

i have a function:[e^(-st)]

Can anyone help me ?

Answer 1

[Kaustubha Govind]

There is the Math Function block for generic exp(u) calculations, but the "s" makes me think that you are implementing a transfer function, is that correct? AFAIK, e^(-ks) corresponds to a time delay of "k", for which I suppose you could use the Variable Time Delay block. Alternately, see How can I have a Transfer Function with delays in a Simulink model using Simulink?.