[gecode-users] changing a Space's AFC decay factor

[Kish Shen]

Hi Christian,

I am not sure if I understand you correctly, but the footnote talks 
about one global AFC decay factor, but the documentation refers to AFC 
-- 'Reset AFC to a' -- does this AFC refers to the decay factor, rather 
than the AFC values accumulated with the constraints? If so, should the 
documentation be changed to mention decay factor (it does in the 
document for the afc_decay() method)

If afc_set() is used to reset the decay factor, then what is the 
difference from afc_decay()? Is afc_decay() used to initialise the decay 
factor, and afc_set() used to change the decay factor later on?

Cheers,

Kish


On 06/12/2013 11:35, Christian Schulte wrote:
> Hi,
>
> Gecode is cheating for AFC, read footnote 1 on page 120 in MPG.
>
> I fixed the link.
>
> Cheers
> Christian
>
> --
> Christian Schulte, Professor of Computer Science, KTH,
> www.ict.kth.se/~cschulte/
>
>
> -----Original Message-----
> From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
> Of Kish Shen
> Sent: Thursday, December 05, 2013 10:05 PM
> To: users at gecode.org
> Subject: [gecode-users] changing a Space's AFC decay factor
>
> Hi,
>
> I am looking at the documentation for AFC in the class documentation for
> Space (section low-level support for AFC), and I don't understand what
> afc_set(double a) does:
>
> The description say it 'Reset AFC to a', but I thought there is no global
> AFC value, as each variable has its own AFC value?
>
> [Also, I noticed a possibly incorrect link in the description for
> afc_decay(double d):
>
> the Set in 'Set AFC decay factor to d' is linked to Gecode:Set ]
>
> Cheers,
>
> Kish
>
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