Re: [Repast-interest] Confusion on "How to build a RePast model - 1"

[Dumoulin N. <nic...@cl...>]

Le mercredi 13 Octobre 2004 11:48, Lars-Bo Jacobsen a =E9crit=A0:
> Hi all
>
> I am completely new to agent based modelling trying to get an insight and
> learn to use the RePast framework.
>
> I have just started out with the How-to " How to build a RePast model - 1"
> and I immediately run into confusion. I am not sure I have understood the
> meaning of this how-to, is it actually a working example? I am confused
> because I run into several errors from the beginning.
>
> Following the how-to I started out with following
>
> import uchicago.src.sim.engine.SimpleModel;
> public class RePast1 extends SimpleModel{
> 	public static final int TIT_FOR_TAT =3D 0;
> 	public static final int ALWAYS_DEFECT =3D 1;
> 	private p1Strategy =3D TIT_FOR_TAT;
> 	private p2Strategy =3D ALWAYS_DEFECT;
> }
>
> Which results (in the Eclipse IDE) in a syntax error on token "=3D" in the
> two "private" declarations.
>
> Changing the two private declaration to (adding a int)
> 	private int p1Strategy =3D TIT_FOR_TAT;
> 	private int p2Strategy =3D ALWAYS_DEFECT;
> Resolves this issue
>
>
> Continuing the How-to adding the setup and buildModel methods
>
>
> import uchicago.src.sim.engine.SimpleModel;
> public class RePast1 extends SimpleModel{
> 	public static final int TIT_FOR_TAT =3D 0;
> 	public static final int ALWAYS_DEFECT =3D 1;
> 	private int p1Strategy =3D TIT_FOR_TAT;
> 	private int p2Strategy =3D ALWAYS_DEFECT;
>
> 	public void setup(){
> 		super.setup(); // Kalder setup() i SimpleModel
> 		p1Strategy =3D TIT_FOR_TAT;
> 		p2Strategy =3D ALWAYS_DEFECT;
> 	}
> 	public void buildModel(){
> 		Player p1 =3D new Player(p1Strategy);
> 		Player p2 =3D new Player(p2Strategy);
> 		p1.setOtherPlayer(p2);
> 		p2.setOtherPlayer(p1);
> 		agentList.add(p1);
> 		agentList.add(p2);
> 	}
> }
>
>
> Results in Eclipse saying that the object Player cannot be resolved or is
> not a type.
>
> I would expect Player to be a Class defined in the
> uchicago.src.sim.engine.SimpleModel but apparently it is not.
>
>
>
> So I am confused - Can I actually use this how-to to learn and build
> something that works or are there more information I need to know before
> proceeding?
>
> I know it's a bit confusing( probably because I completely new to RePast)
> but I hope someone can comment on these issue, have I started in the right
> place.
>
> Kind regards
>
> Lars-Bo

Hi,

I recommend you an other tutorial, quite longer, but very good, at :
http://www.u.arizona.edu/~jtmurphy/H2R/HowTo01.htm

I think that the REpast howto's are good for an overview of the mechanism, =
but=20
that the code is not complete. An other solution (very good too) is to look=
=20
at the samples sources.

Best regards

=2D-=20
Nicolas Dumoulin
Doctorant / PhD Student

CEMAGREF, LISC=20
24 avenue des Landais - BP 50085=20
63172 AUBIERE CEDEX 1 - France=20
=20
Tel. : 33 (0)4.73.44.07.29
IM : bo...@ja... - 131572326 (ICQ)