[Scip] SCIPaddColDive()

[Ambros Gleixner]

Aaahhhh yesss.  I forgot about that asymmetry between rows and columns 
in the SCIP_LP.  Let's solve this off the mailing list, since not 
everybody will be interested in such technicalities.

Ambros




Am 06.05.2013 18:22, schrieb Jonas Witt:
> Hi all,
>
> the problem with the SCIPaddColDive() is that SCIP is not able to create
> a lp column without a corresponding variable. So it is possible to add
> an existing column of a variable to the dive lp, but if you want to
> create your own column (this is what I wanted to do) this is a bit more
> difficult.
>
> One might write functions to create an empty column, to add a column to
> a row or to delete a column. In the SCIPlpShrinkCols() there are some
> assertions that would not fit anymore, if a column has no corresponding
> variable (assert(col->var) != NULL etc.).
>
> Do you have any ideas how to make this work?
>
> Best regards,
> Jonas
>
>
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-- 
____________________________________________________________
Ambros M. Gleixner
Zuse Institute Berlin - Matheon - Berlin Mathematical School
http://www.zib.de/gleixner