[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Bug-glpk] Re: Only MPS writer warns about empty columns and other write
From: |
Andrew Makhorin |
Subject: |
[Bug-glpk] Re: Only MPS writer warns about empty columns and other writers don't |
Date: |
Wed, 03 Nov 2010 22:59:58 +0300 |
> This is a minor inconsistency.
>
> I tried to write out my problem to various formats. And only MPS writer
> printed this:
> Warning: problem has 27 empty column(s)
>
> Other writers: MIP,SOL,LPX didn't complain even though this is the same
> problem.
>
> Different writers should produce the same warning on the same problem.
>
No, they shouldn't. The reason is that the mps format, unlike other
formats, is column-oriented, so an empty column cannot be written in an
mps file without introducing a dummy zero coefficient in some row.
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Bug-glpk] Re: Only MPS writer warns about empty columns and other writers don't,
Andrew Makhorin <=