[Developers] FW: ADMB-RE

[dave fournier]

On 11-10-23 04:07 PM, Mark Maunder wrote:


When I developed ADMB Griewank wanted me to make the copy constructor for
dvariables to be a deep copy. This introduced all kinds of technical 
difficulties
(hence the exestence of prevariables). It did not seem to have any real 
advantage.
So for df1b2variables I went back to shallow copies. The only thing you 
need to
lnow is that as you discovered

     df1b2variable x =y;

means that x and y are the same.  This is already the case for dvar_vectors.
>
> See below
>
> *From:*Richard Bian [mailto:r.bian at niwa.co.nz]
> *Sent:* Sunday, October 23, 2011 2:49 PM
> *To:* Mark Maunder
> *Subject:* ADMB-RE
>
> Hi Mark,
>
> When I code my model, I noticed something interesting in ADMB-RE. 
> Assuming x is a dvariable, if I declare another dvariable y this way, 
> dvariable y=x; then when I change y, x will be changed in the RE 
> round, but not in ordinary ADMB round. I guess when ADMB-RE converts 
> the tpl to cpp in the df1b2_parameters functions, it declares y as x's 
> reference rather than an normal variable. I didn't see this mentioned 
> in the manual, so I think I'd let you know about this.
>
> Regards,
>
> Richard
>
> Richard Bian
> National Institute of Water & Atmospheric Research
> 41 Market Place
> Auckland Central 1010, New Zealand
> Tel: +64 9 375 2054  Fax: +64 9 375 2051
>
> Please consider the environment before printing this email.
>
> NIWA is the trading name of the National Institute of Water & 
> Atmospheric Research Ltd.
>
>
> _______________________________________________
> Developers mailing list
> Developers at admb-project.org
> http://lists.admb-project.org/mailman/listinfo/developers

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.admb-project.org/pipermail/developers/attachments/20111023/b2810285/attachment.html>