Are there any isempty command block in Simulink?

I want to use isempty command in Simulink. Are there any block to do this? Thank you.

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/simulink/slref/width.html can emit the width of a signal; you could then compare it to 0.

... Or just create a small MATLAB Function Block

[Ali Deniz]

Thank you