tout (time) is not working

so while i was using simulink to try to modelise a signal schematic and when i use the gain component and try to put this expression tout(length(tout)) in the gain expression i get the following error 'Variable 'tout' does not exist.' , well i m not an expert on matlab so if you guys can help it would be much appreciated

Answer 1

[Ameer Hamza]

tout is only created after the simulation is complete. Therefore, you cannot use it as an input to gain. It seems that you want to find out the stop time of the simulation. If yes, then you can use the following command in the gain block.

str2num(get_param(bdroot, 'StopTime'))

[Ayoub Bouhal]

yeah , now seems to work just fine thanks a lot for the help

[Ameer Hamza]

I am glad to be of help!