[Scip] HOW TO USE SCIP_VARDATA

[dponce at us.es]

Hi Gregor, 

I was trying it before but what I don't know is to create this
subclassing. All that I can get is that it compile and then I get the
message "Segmentation fault (core dumped)". 

I'm sorry because maybe it is not an SCP question but a C++ question. 

I do not understand yet in what case it is possible using SCIP_VARDATA
with SCIPcreateVar(). 

Thanks. 

Diego. 

El 02/08/2014 13:42, Gregor Hendel escribió: 

> Hi Diego,
> 
> using C++, you can create customized variable data by subclassing scip:ObjVardata from objvardata.h [2]. Variables which should use your variable data can be created by calling 
> SCIPcreateObjVar() [3] instead of SCIPcreateVar(). The VRP-example uses the latter method for the priced variables because no custom variable data is necessary there.
> In order to access your variable data later, you need use SCIPgetObjVardata().
> 
> Hope that helps,
> Gregor
> 
> Am 01.08.2014 13:42, schrieb dponce at us.es: 
> 
>> Hello mailing list, 
>> 
>> I´m using SCIP for a branch-and-price problem. In my pricer I need some data associated with variables fixed to zero in order to avoid add them. So, in the binpacking example I saw how get this variables by means of SCIPgetVars() and SCIPvarGetUbLocal() functions. 
>> 
>> The problem I have is that I'm not able to store the information (a vector of pairs, its dimension and another integer) in the SCIP_VARDATA variable. Then I guess I am having the same problem for recover the information after using SCIPvarGetData() from the SCIP_VARDATA variable. 
>> 
>> I've tried using vardataCreate() structure in the binpacking example or class ObjVardata without success, in principle. 
>> 
>> I´m using VRP as template, so I'm writting in C++. 
>> 
>> I´m looking forward comments. 
>> 
>> Best. 
>> 
>> Diego Ponce. 
>> 
>> _______________________________________________
>> Scip mailing list
>> Scip at zib.de
>> http://listserv.zib.de/mailman/listinfo/scip [1]
 

Links:
------
[1] http://listserv.zib.de/mailman/listinfo/scip
[2] http://scip.zib.de/doc/html_devel/objvardata_8h_source.php
[3]
http://scip.zib.de/doc/html_devel/objvardata_8h.php#a8c9be3e5b510487d59fdc065464e401b
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