How to know which if is 'triggered''?

Hello everyone!

I have a script which has 6 possibles (and random) cases, and I want to know exactly when each case was 'triggered' randomly. I tried something using return and disp inside the if, but unsuccessfully.

There is a part of my code:

function [Rarc,R2] = fcn1(Varc,Iarc)
switch selection
    case 1
        if isempty(g_ant, 'return1')
[...]
   disp(return1) 
end             

Is there any easy solution?

Thank you all in advance.

[Walter Roberson]

What does isempty(g_ant, 'return1') mean to you?

[Gustavo Araujo]

Oh, I forgot to mention that is a Matlab Function Block, inside a simulink simulation. Means that if the variables that I call below this part, some variables will be assigned.