How to generate multiple entities randomly and control the probability of event occurring?

I am trying to create a model in which 4 different entities are generated randomly. Once the entity is generated, then I want to be able to control the probability that the generated event occurs. Is something like this possible, how can it be done?

Answer 1

[Will Nitsch]

Could you possibly use random number generation ('rand')? Say something has a 25% probability of event 'X' happening, 35% for 'Y' and 40% for 'Z'. You could say:

 val = rand;
 if(val<=.25)                    %  25% chance
     % event X
 else if(val>.25 & val <=.6)     % .6-.25 = .35 for the 35%
         % event Y
     else if(val>.6)             % 40% chance
             % event Z
         end
     end
 end

[Sebastian Stankiewicz]

Would I enter this into the entity block for the Matlab function? Would it be in entity generation or event actions? Also, how do you generate a graph for when utilization of resources using blocks from version 5.2. Thanks!