How to do probalistic routing in Simulink/Simevents?

I'm looking for a way to take a single input, and then based on statistics, route that signal to different blocks. For example, signal A has a 70% chance of going to Block 1, and a 30% chance of going to Block 2. So when running the model many times, sometimes the signal will take one route and sometimes another. How can I do this? Is there a way to associate probabilities with lines/branches? Thanks so much, N

Answer 1

[Albert Yam]

Have you tried a Random Number block, with a switch.

[Nat]

The switch only has one output, I would like multiple outputs....

[Kaustubha Govind]

Multiport Switch: http://www.mathworks.com/help/toolbox/simulink/slref/multiportswitch.html

[Nat]

Thanks for the suggestions, but this still does not help. I need a single input, multiple output switch. The only thing I can find is the other way around...

[Nat]

Got it! I will use the set attribute block with a RN generator in simevents. Then when it's time for routing, I will use the Output Switch which will route the entity based on the attribute.

[Sebastian Stankiewicz]

Could you possibly send an example of how you did this? How could you control the probability of an event using the RN generator? Also, how did you route the entity based on the attribute?

Answer 2

[Marco Fanti]

get a probability vector, like

D= [1 0.2 ; 2 0,5 ; 3 0,3];

the first column contains the port you wanna send the entity to, the second one the probability

sort it so to have the greatest probability at the bottom and call it with a different name like

Ds= [1 0.2 ; 3 0.3 ; 2 0.5];

now set the output switch as swtich from attribute

in in a block that preceeds the outputswitch type in this code as event action

rnum=rand();
for i=1:size(Ds,1)
if rnum<=sum(Ds(1:i,2))
entity.Type=Ds(i,1);
break
end
end