If Action Block that create a stairstep signal in simulink

Hello,

I have two questions:

1. I use a If Block to "cut" the signal and not perform some operations (not depicted below). Is it the right approach to use a "If Block" for interupt the signal and don't allow to perform some tasks by the model?
2. However I notice that after the "If Block" the signal became discrete (see the plot below, where you can see a stairstep plot), even if before the "If Block" the signal was continous (see the plot below, where you can see a continous plot). How to convert again the discrete signal into a continous?

Answer 1

[Fangjun Jiang]

The "sample time" of the Constant block might have been set as "1" second.