[gecode-users] Obtaining information about variablesHi for variable selection

[Christian Schulte]

Hi,

Sorry, it's me again. I think I know the problem: when you check the members
in the doc you only see the direct members but not the inherited ones. But
there is always a link for showing all members, check here for IntVar:
	
http://www.gecode.org/doc-latest/reference/classGecode_1_1Int_1_1IntView-mem
bers.html

Cheers
Christian

--
Christian Schulte, www.ict.kth.se/~cschulte/


-----Original Message-----
From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of Christian Schulte
Sent: Monday, July 20, 2009 2:20 PM
To: 'Mikael Zayenz Lagerkvist'; 'Kish Shen'
Cc: users at gecode.org
Subject: Re: [gecode-users] Obtaining information about variablesHi for
variable selection

Hi Kish,

I am just back from holidays. Actually, there is no problem. For an IntVar
x, x.degree() returns the number of subscribed propagators (just checked)!
What was the error you got?

The only thing that's missing is regret_min and regret_max which will be
available for IntVar (and BoolVar) in the next release.

Christian

--
Christian Schulte, www.ict.kth.se/~cschulte/

-----Original Message-----
From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of Mikael Zayenz Lagerkvist
Sent: Thursday, July 02, 2009 7:18 AM
To: Kish Shen
Cc: users at gecode.org
Subject: Re: [gecode-users] Obtaining information about variablesHi for
variable selection

Hi,

The degree-information for variables is only available through the
view-interfaces [1]. Similarly for regret-information.

As a simple example, given that you have an IntVar x, and you want to
access the degree-information, you could do the following:
    IntVar x;
    // ...
    Int::IntView xv(x);
    if (xv.degree() > some_degree) {

Cheers,
Mikael

[1]
Integer views:
http://www.gecode.org/doc-latest/reference/group__TaskActorIntView.html
Set views:
http://www.gecode.org/doc-latest/reference/group__TaskActorSetView.html

On Thu, Jul 2, 2009 at 3:43 AM, Kish Shen<kisshen at cisco.com> wrote:
> Hi,
>
> Is it possible to obtain the information used in the branch() variable
> selection. I am currently most interested in the degree (number of
> propagator depending on a variable) for the IntVars, because there I
> can't find any easy way to obtain this information, but I assume Gecode
> keeps this information internally.
>
> The reason I am interested in this information is for the interface to
> Gecode I am developing for ECLiPSe. I now have a basic working version
> where Gecode is used to perform the propagation of the constraints,
> while ECLiPSe does the search, which include variable and value
> selections. I need the degree information for variable selection, and
> because the selection is done in ECLiPSe, I cannot use branch().
>
> Thanks in advance for any help and information!
>
> Cheers,
>
> Kish
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-- 
Mikael Zayenz Lagerkvist, http://www.ict.kth.se/~zayenz/

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