[Cbc] Decimal round off in cbc

[Haroldo Gambini Santos]

Hi,

Most LP based  solvers use limited precision (double) to compute 
solutions. Thus, you can expect some "trash" to appear after, say, the 
9th decimal place.

Gurobi has a special mode where quad precision is used.

GLPK has an exact mode but I think that it only applied to LP (no MIP).



On 17-07-2017 09:06, nikhil t.v.s wrote:
> Hi,
>           I am using MILP. During solving, i want the decimal variable 
> precession to be rounded to limited places. (some times solver returns 
>  variables values of factor e^-12). Is there a way to limit it.
>
> Thanks,
> Nikhil.
>
> Regards,
> T. Venkata Sai Nikhil,
> International Institute of Information Technology -Hyderabad.
>
> On Mon, Jul 17, 2017 at 5:20 PM, Fausto Richetti Blanco 
> <fausto.blanco at gmail.com <mailto:fausto.blanco at gmail.com>> wrote:
>
>     I think you're looking for an integer solver and still didn't
>     realize it... am I right?
>
>     Take a look at MILP to see if that is what you need
>
>     On Sun, Jul 16, 2017 at 10:02 PM, nikhil t.v.s
>     <t.v.s.nikhil123 at gmail.com <mailto:t.v.s.nikhil123 at gmail.com>> wrote:
>
>         Hi ,
>                I am new to cbc solver. How can i restrict the
>         precession of all decimal variables.
>         Tried tolerances but don't have clear understanding of them.
>         Anyone pls help.
>
>         Thanks,
>         NIKHIL,
>         IIIT-Hyderabad.
>
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-- 
==================================================
Haroldo Gambini Santos
D.Sc, Computer Science
Universidade Federal de Ouro Preto
http://www.decom.ufop.br/haroldo/

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