[Scip] unsolved child/sibling nodes during node selection

[Ambros Gleixner]

Dear He,

the relaxation solution of a node only exists while the node is being 
processed.  Then it can be accessed by SCIPgetSolVals().  If you want to 
access solutions of previous nodes, you would need to store them 
yourself in your (node selector) plugin.  An unsolved node only has the 
dual bound of its parent, but no LP solution.

Kind regards,
Ambros


Am 26.09.2014 um 04:28 schrieb 何河:
> Also, how can I get the LP solution associated with a node? Thanks!!
>
> On Thu, Sep 25, 2014 at 10:09 PM, 何河 <hehe.rebecca at gmail.com
> <mailto:hehe.rebecca at gmail.com>> wrote:
>
>     Hi all,
>
>     I printed the node type during node selection, some are labeled as
>     unsolved child/sibling of the focus node. Does that mean the node's
>     LP has not been solved? What if the node selector needs information
>     of the LP solution, say the lower bound?
>
>     Thanks!
>
>     He
>
>
>
>
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-- 
____________________________________________________________
Ambros M. Gleixner
Zuse Institute Berlin - Matheon - Berlin Mathematical School
http://www.zib.de/gleixner