[Coin-discuss] Osi and Add/Delete rows
Jan-Willem Goossens
j.goossens at t75.nl
Mon Nov 7 16:03:01 EST 2005
Hi all,
Again, thanks for your replies. I know what to do now.
Jan-Willem
----- Original Message -----
From: "Lou Hafer" <lou at cs.sfu.ca>
To: <coin-discuss at list.coin-or.org>
Sent: Friday, November 04, 2005 17:45
Subject: Re: [Coin-discuss] Osi and Add/Delete rows
Folks,
At least at the time I was writing OsiDylp, the OSI unit test enforced
the notion that delete should not reorder rows. Native add/delete for dylp
is
an O(1) operation that moves the last constraint to fill a vacated slot. I
ended up implementing a new delete routine that worked as Jan-Willem
describes.
Lou
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