[Coin-discuss] Re: MpsIO (continued)

[John J Forrest]

Francois,

Will change.  Also I will make functional the formatType 2 (preserve IEEE 
accuracy) which may be a useful option as that would be platform 
independent (may help Jorg).  As decoding numbers in CoinMpsIO is done 
without using sscanf or any library routines one could do the same for 
encoding numbers.  This would make things consistent on all platforms.  It 
is a bit of work to make work in all circumstances but I could do if 
people think it would be a good idea and if I am feeling bored.

The IEEE accuracy option will encode the 64 bit IEEE floating point number 
into a 12 character field by translating 6 bits into 64 of the printable 
ASCII characters.  This maintains exact numbers including INF or NAN.

John Forrest



"Francois Margot" <fmargot at andrew.cmu.edu> 
Sent by: coin-discuss-admin at www-124.southbury.usf.ibm.com
03/29/2004 11:24 AM
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[Coin-discuss] Re: MpsIO (continued)






Steve:

The row and col names are ignored in
OsiSolverInterface::writeMpsNative(). The call

writer.setMpsData()

in that function (around line 600) passes null vectors instead of
the parameters rowNames and colNames. Replacing on line 605

(const char **)0, (const char **)0);

by

(const char **) columnNames, (const char **) rowNames);

seems to work.

Francois


> Message: 3
> Date: Sat, 27 Mar 2004 23:30:01 -0500
> From: steven.henderson at us.army.mil
> To: coin-discuss at www-126.southbury.usf.ibm.com
> Subject: [Coin-discuss] MpsIO (continued)
> Reply-To: coin-discuss at www-124.ibm.com
>
> Folks,
>
> Regarding my last post, I did solve my problem with COIN Util's
> MpsIo:setMpsData(...).  If your packed matrix has columns that exceed
the
> dimension of your col_lb/col_ub, then this will cause the garbage in the
resulting MPS file.
>
> However, I am still curious if anyone knows how to use
> OsiSolverInterface:writeMpsNative to set row and col names.
>
> Have a great weekend!
>
> Steve
>
>
>
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