for an analysis of a production process, I want to spawn agents in my source block according to past real data.
For that, I want to use an arrival table to make sure that the agents spawn at the correct time.
But I also need to give my agents different parameter variations.
For that, I want to use the "Set agent parameters from DB" checkmark.
However, it seems that I can't use both of them combined. Is there a way to use an arrival table and a parameter DB combined?
Thanks a lot in advance.
Yes, you can. You need to use a single table for all the information regarding the agent.
See the example table below
You also need to create a customer agent for your source with parameters you want to populate from the DB
Then in the source you can select to generate this agent at the "new Agent" dropdown. Then you will be able to populate all the agent parameters from table you specified
Related
In my source block I want to be the amount of agents based on two different factors namely the amount of beds and visitors per bed. The visitors per bed is just a variable (e.g. visitors=3) and the amount of beds is loaded from the database table which is an excel file (see first image). Now I want to code this in the code block as shown in the example in image 2, but I do not know the correct code and do not know if it is even possible.
Simplest solution is just to do the pre-calcs in the input file and have in the dbase.
The more complex solution is to set the Source arrivals as:
Now, you read your dbase code at the start of the model using SQL (i.e. the query constructor). Make the necessary computations and create a Dynamic Event for each arrival when you want it to happen, relative to the model start. Each dynamic event then calls the source.inject(1) method.
Better still is to not use Source at all but a simple Enter block. The dynamic event creates the agent with all relevant properties from your dbase and pushes it into the Enter block using enter.take(myNewAgent)
But as I said: this is not trivial
I am trying to figure out which are the main default attributes of agents in Anylogic, e.g., the Id, the position and the index. So far I haven't found them in the help or at stackoverflow.
1) Do you know where this can be found or can you summarize the main you know? For instance the id used as unique identifier or the index used as the position inside of the population.
2) Are there any attributes regarding the agent history? For example time stamps as the creation time or the blocks it has passed through?
3) Is it possible to change the default id attribute of an agent? Can two agents have the same id?
4) As the split block doesn't copy any of the parameters or variables values to the copy, what is the proper way to copy an agent? I noticed in other publication Benjamin mentioned using agent.set_MyParam(original.MyParam). What would be "MyParam" in this code? Would this copy the value of parameters, variables and the current state in the statechart? Is it possible to make a copy and initialize its current state in the statechart as the original agent's current state?
Thank you for your help.
There are many things that are generated when you generate an agent... the best you can do is to check the api for the agent here: agent api
You can only see these things on the log if you activate it, but not from the API
the id is a unique identifier and i've never been in a situation where i need to change it,but if you want to change it, you can use the setId method, in which case, 2 or more agents may have the same id.
you can only use set_MyParam if the MyParam is a parameter, you can't do the same with variables. Nevertheless, if you want to copy an agent, you need to do it variable by variable, state by state, everything from scratch. There's no magical way to copy the exact same agent with all its current values and states and connections etc
how is it possible that the sourceof a process model only creates the agents out of a population and in best case at once? In my model the source is creating more agents than the size of the population.
thx in advance
Using a Source it is not possible to output already existing Agents of a population from it, as the source is always creating them at the time of output.
You have two possibilities:
Instead of a Source, use the Process Modelling element Enter at
the start of your process flow. Using the function
enter.take(myPopulation.get(index)) you can input your already
existing population members. This way you can also input them "at once".
In the Source properties under Advanced - Population select your
custom population. Whenever the source creates a new Agent, it will
get added to this population. Note: The Agent type of the population
must be the same as the Agent type defined in the Source.
I have a stock agent which is created in the end of my production line. My products are characterized by their model. I'm trying to create a logic to take out the products from this stock agent when they are to be delivered to the client. This delivery is controlled by an excel sheet and I'm taking the information through a SQL code. However, I was not able to find the right code to take out the products which are to be delivered. My agent population is called ProdutoStock and it's located in my main screen.
I have tried: Main.remove_ProdutoStock() but i couldn't figure out the arguments that i need for this function, since i have to take out of the agent a specific number of agents and also of a specific model.
So, I decided to create a wait block and use the free function to free the specific agents i wanted main.waiting_delivery.free() but i also can't figure out the necessary arguments for this function.
Would someone have any idea how I can take out of my agent/line the products that I need to deliver for my client (considering quality and also model)? This code is not being typed into my main screen.
the argument of the free method is the agent itself.
So you have to do main.waiting_delivery.free(yourAgent);
If you want to free the last agent that entered the wait block:
if(main.waiting_delivery.size()>0)
main.waiting_delivery.free(main.waiting_delivery.get(0));
If you want to free agents following a certain condition
List <YourAgent> theAgents=findAll(main.yourAgentPopulation,a->a.condition==true);
for(YourAgent a : theAgents){
main.waiting_delivery.free(a);
}
Is there a way to add agents through pedSource but give them nominal values for added parameters?
We have different parameters within a specific agent that are in a DB and want them to be initialized when agent is created in population.
We tried doing it using the advanced option in pedSource but the "from DB " option does not have our added parameters, only the default ones for pedestrian agent.
good to see you here :-)
Sounds like you need to create your own Agent Type to be used for your pedestrians. Create a new agent type and set it up to be used as pedestrians as below:
Next, make your PedSource object create these MyPeds and not the default peds:
Now, you can add your parameters to MyPed as you like. Let's say it has 1 param myParam. To load values from the dbase, also create a MyPed population (drag in the MyPed class onto Main), set it as below:
Last, you need to tell the source object to add any MyPed created to your new population as it will fill the params:
hope this helps