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Showing results for 'api random'.
Found 9 results
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Is it possible to specify the random stream used for the RandomRow function?
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In my model, there are 2 types of entities created by 2 sources: Entity Type A and Entity Type B.The changeover setup time matrix is something like Previous Entity Type A TypeB Incoming Entity Type A 0 Random.exponential(15) Type B Random.Exponential(10) 0 I know how to do it using the changeover matrix, but apparently, the changeover matrix can't take random distributions. May I have some suggestions as to how to go about this? Thank you!
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How can I schedule a randomly distributed death event for each entity, and pull them out of the system (or perhaps route to a "mortality" sink) if it occurs before they have already left? Somewhat similar to reneging, but I need mortality to be possible during a service, not only in queues. If an entity is removed from service, I also need the seized resources to be released. What I have tried so far: When an entity is created, I provide them with a state variable for TimeTillDeath, lets say exponential(2) hours. This is a real number, not a datetime. As they enter each queue, I set the reneg trigger as ModelEntity.TimeTillDeath subtract any elapsed time since creation, min 0. This works to model mortality while they are waiting for service, but not during a service. Any help is appreciated, KO -
Hello, I have a data table with 900 total entities, comprised of 10 different types of entities. I am trying to randomize which entities go through the model, but I need all 900 to go through. I've tried the "entity mix" technique, but it always overloads my model with too many entities. Does anyone have an idea of how to go about this? I want to run a series of experiments with a random selection of entities for each replication. I hope this makes sense. Thanks in advance! -Mario -
Hi guys I'm doing a model of and evacuation plan for an airplane with 749 passengers. The passengers have to evacuate between the seconds I introduce in the table with the function random.uniform, in seconds and numbers between 0 and 5, that is the time a passenger needs to get up from their seats or walk to the door and jump the security slide. The problem that I have is that I introduce in the table some Random Uniform values to passengers, they must move by the model in that time (between 0 and 5) but, for some reason, passengers aren't taking those numbers, instead they turn in numbers under 0,00. That's a real problem because it's an airplane with 749 passengers evacuating in 5 seconds because of that, obviusly something impossible. Could anyone help me please? Thanks! -
I want to delay my vehicle with randomly selected times, which it retrieves from a data table. I have set the delay as Table1.ExpressionProperty1.RandomRow, but it doesn't work the expressiontable has 10 different values for delays and has time as a unit Can someone help me figuring out what is wrong?
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I need to select Node from NodeList, but based on random. All nodes should have equall probability of beeing selected. Does anybody know if this is possible? I made a workaround with assigning each node a number from 1 to N and then first generate the random number and then search for appropriate Node using SearchStep, but this requires for setting numbers for each node manually and I have a lot of nodes in my model. Is there a way to use a rank of node in the node list? Thanks for help. Petr
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Hello, i want to model time varying arrival rates for my entities. If I choose rate tables I can't select random arrival rates. Is there any possibility to do so? Regards Nadine
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Just for fun I did a Lotto object that can meet this need. It simply keeps track of what samples have already been generated and prevents reusing a number. LottoGenerator.spfx
