Repast

Hi All,

I'm working with some events that are scheduled other than at  
integral time steps. I'd like to collect and output this data, e.g.,  
sending and receipt of messages. Any guidance as to which classes  
I'll need to customize to collect and output this data? I'm expecting  
there to be no GUI support for this, but would be pleasantly  
surprised. ;-)

For example, I have Agent A sending message B, at time t, and I'd  
like to collect data like this (there're also may be other state data  
I'd like to collect at the same time):
Run, Time, Agent, Message, OtherData,...
1, 1.435, A, B, ...
...

thanx
steve


Stephen C. Upton
Research Associate
SEED (Simulation Experiments & Efficient Designs) Center
Operations Research Department
Naval Postgraduate School
Cell: 831-402-3888
NIPR: scupton@...
SEED Center web site: http://harvest.nps.edu

Hello Eric, 



Thank you so much for your answer. It was very helpful. I am running into
another problem now and I have a feeling it is related to the first issue.
When I add the edges to the network before I start running the simulation,
all the edges are displayed when I start running the simulation. But
whenever I add an edge during the simulation, the edge never gets displayed.
It does get displayed on 3D GIS and on a different display that I use to
only display the network. So the edge is being created using the same way
you told me to create it in the previous email. I hope my point is clear to
you. 

 

I really appreciate your time.

Mike,

Thank you for your swift response. I have taken a first look at XStream
and it seems very suitable for what I am planning to do.

On a side note, I ran into the following website, which might have very
well been developed by some other members of this mailing list

http://condor.depaul.edu/~slytinen/abm/StupidModel/

I find the JAVA code for the 16 model implementations there extremely
useful. 

 

Thanks again for your help.

Best,

Vlado

________________________________

From: North, Michael [mailto:north@...] 
Sent: Friday, December 05, 2008 8:27 PM
To: Uzunangelov, Vladislav; repast-interest@...
Subject: RE: [Repast-interest] Repast newbie in need of help

 

Vladislav:

 

Thank you for considering Repast! I have included below a few of my
personal thoughts in reply to your questions. Obviously, the decision is
ultimately up to you.

 

Mike

 

________________________________

From: Uzunangelov, Vladislav [mailto:vuzunangelov@...] 
Sent: Friday, December 05, 2008 12:50 PM
To: repast-interest@...
Subject: [Repast-interest] Repast newbie in need of help

 

Hello all,

I am in the process of developing a JAVA-based model simulating the
distribution of obese patients in a firm. My simulated patients do not
interact at this stage, so my model is not really agent-based, more of a
straight discrete-event simulation. My initial inclination was to model
it directly in JAVA, but two things made me consider RePast. On one
hand, it seemed to have a visual editor that would simplify creating the
individual agents and setting up the simulation framework without
necessarily having to write out all the code; on the other hand, future
developments of the model will most likely include agent interactions,
so I thought best to start learning RePast right now.

 

I have looked through the tutorial and successfully ran the demo code
that came with the RePast Installation. I still have several questions I
haven't been able to answer for myself , and I was hoping one of you
would be kind enough to help me out with them. Here they are:

 

1.	In my simulation I will have to use input data tables with
several dimensions. The most sensible way seemed to input them in some
sort of parameter array that RePast could recognize. I found an old
thread talking about inputting parameter arrays, and the impression I
got was that there is no such GUI functionality built-in the visual
editor, but one might get along by doing it in code during the model
initialization. Is this correct? As a follow-up , if my data can come in
csv or xml format, can someone direct me towards the some JAVA packages
that make this initialization less painful? What I am really hoping for
is a package that has something like VB.Net's Dataset.readXML() command
which would output a JTable or something similar. 

 

You might look at XStream (http://xstream.codehaus.org/) which is can be
used either as a Repast freeze dryer or as a separate component.

 

2.	I did not find any models in the demo directory show code for
the loading of input data more complicated than scalars or strings. Is
there some code repository where I can get such examples? 

 

These are the only officially posted examples. Some other people on the
list may be able to help with this though.

 

3.	I apologize if some of those questions have been answered in a
previous search, but I had a hard time getting relevant matches when I
searched the sourceforge archive site. I had to go through google to
find the thread I was talking about in 1. Is that a common experience?
Is there a better way to search through the source forge archives than
the search toolbar in there?

 

Unfortunately, this seems to be what can be done for now.

 

4.	And finally, do you think picking RePast is a good idea?
Forgetting future developments for a second, if all I want to do is
write a discrete-event simulation in a JAVA-based package with good
visual editing abilities (drag and drop type) and good documentation,
which one would you recommend? I would prefer open source packages, but
since most of those come with little to no GUI editing abilities, I am
open to commercial suggestions as well.

 

I believe that Repast is a good choice for the kinds of things you wish
to do, especially if you prefer open source software.

 

Thank you very much for your help. I am greatly indebted.

Best,

 

 

Vladislav Uzunangelov

e-mail: vuzunangelov@...

Hello Stefan,

I found out the same thing After your ideas about the system output creating
the problem, I got an idea:

 public void setup(){
    System.out.close();
    System.out.println("Running setup");

This was the solution for me. So by closing the system.out it gets flushed
somehow and then the setup can be run smoothly. Good luck!


Stefan Vitz wrote:
> 
> Mhhh..
> 
> I proved myself wrong.
> 
> I noticed that i can reproduce the crash when
> adding some System.out.println lines to an running version.
> That is what made testing so frustrating...
> The more debug-outout i addet the more often
> the "start, stop, setup" procedure crashed.
> 
> reducing the complexity came along with 
> deleting those system.out.printlns.
> 
> 
> Can someone affirm that repastJ
> has problems with output
> during its intern steps.
> in my case AbstractGUIController?
> 
> 
> best regards,
> Stefan
> 
> 
> 
> 
> -- 
>    ,---\----/  
>    \____\  /    Stefan Vitz	 Bielefeld    public GnuPG key:
> _______/ \/	stefan@...	 Germany      http://w148.de/~svitz/pubkey.asc
> 
>  
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Hello,

 

I am having a problem in displaying my network in a GIS projection. It is
working fine with 3DGIS projection but whenever I try to display it in 2D
GIS it never shows up. No errors in the log file as well. I also tried to
change the style with no luck. Can you please give me a hint on what could
possibly be the problem?

Thank you for your time.

Hi.  I want to solve the following problems:

1) I want to be able to display my patches and my agents separately. 
The agents should be displayed over the patch display.  Patches are 
stored in an Object2DGrid while Agents are stored in a Multi2DGrid.

2) I want to be able to display multiple Agents as separate dots within 
a Patch in a simple, easy to interpret arrangement (say, in a circle).

Any help would be appreciated.  Thank you.

-- 
Sincerely,
Benjamin Hanowell
UW Biocultural Anthropology, Graduate Student, 2nd Year
IGERT Program in Evolutionary Modeling, Fellow, 2nd Cohort
Self-proclaimed Galactic Overlord

"Once one has lost
the sense of measure,
there is no longer any limit."
-Epictetus