[Cbc] Getting CSV result with variables only greater than epsilon (1e-4), no zeros result

[Noli Sicad]

Hi Haroldo,

I did not work.

I followed your instruction ( i.e. changing 1.0e-8 to 1.0e-4 ) and
saved the file.

And then:

~~~~
make clean

make

sudo make install

~~~~

However, it did not work. I am still getting the variables with zero
values in my CSV output.

I tried to solve and output (without zeros vallues) in my LP model but
I did not work.

I like to this as well in my MIP model (i.e. not getting the zero
values of the variables).

Any other option to this?

Thanks.

Regards,

Noli


On 3/13/16, Haroldo Gambini Santos <haroldo.santos at gmail.com> wrote:
> Hi Noli,
>
> In CbcSolver.cpp,  line 9685,  just change
>         } else if (fabs(primalColumnSolution[iColumn]) > 1.0e-8) {
> to
>         } else if (fabs(primalColumnSolution[iColumn]) > 1.0e-4) {
>
> Cheers,
>
> Haroldo
>
> Em 11-03-2016 21:56, Noli Sicad escreveu:
>> Hi,
>>
>> I like to get results  of variables only greater than epsilon( 1e-4).
>>
>> # significantly different from zero
>> epsilon  = 1e-4;
>>
>> How do I do this? Which source file should I modify and how?
>>
>> My MIP model submitted to CBC solver is quite big (e.g. greater than
>> 50,000 columns) and most of the results are just zero (0). Opening in
>> the spreadsheet is slow when cleaning the result.
>>
>> I think it would be good to have option in the CSV output with
>> variables only greater than epsilon  (1e-4). No zero (0) included in
>> the CSV output.
>>
>> Thanks.
>>
>> Regards,
>>
>> Noli
>> _______________________________________________
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>> Cbc at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/cbc
>>
>
> --
> ==================================================
> Haroldo Gambini Santos
> D.Sc, Computer Science
> Universidade Federal de Ouro Preto
> http://www.decom.ufop.br/haroldo/
>
>