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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Such as / which do you recommend ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Will they provide better solutions through “intelligent” mapping to CBC, or “only” a simpler interface?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:-15.75pt;mso-list:l0 level1 lfo1">
<span lang="EN-US" style="mso-fareast-language:EN-US">Bjorn<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Cbc [mailto:cbc-bounces@coin-or.org]
<b>On Behalf Of </b>Gleb Belov<br>
<b>Sent:</b> torsdag 5. oktober 2017 03:13<br>
<b>To:</b> cbc@coin-or.org<br>
<b>Subject:</b> Re: [Cbc] Cbc Digest, Vol 122, Issue 7<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi Bjorn,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">you can use high-level modeling languages which interface CBC and take care of non-linearities and global constraints.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Gleb<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 4 October 2017 at 20:57, <<a href="mailto:cbc-request@coin-or.org" target="_blank">cbc-request@coin-or.org</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
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Today's Topics:<br>
<br>
1. Re: Multiplying two binary variables in the objective<br>
function (John Forrest)<br>
2. Re: Multiplying two binary variables in the objective<br>
function (John Forrest)<br>
3. Re: Increase number of digits in solution file<br>
(<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 4 Oct 2017 09:57:57 +0100<br>
From: John Forrest <<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>><br>
To: <a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a><br>
Subject: Re: [Cbc] Multiplying two binary variables in the objective<br>
function<br>
Message-ID: <<a href="mailto:97638c11-e95d-8cbc-9754-c13e559f35b7@fastercoin.com">97638c11-e95d-8cbc-9754-c13e559f35b7@fastercoin.com</a>><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
Bjorn,<br>
<br>
Probably simplest/best to make into Special Ordered Set of type 1 with 4<br>
variables<br>
<br>
B1_0_B2_0, B1_1_B2_0, B1_0_B2_1, B1_1_B2_1<br>
<br>
with objective values 0.0, 12.3, 12.3, 151.29<br>
<br>
and constraint<br>
B1_0_B2_0+B1_1_B2_0+B1_0_B2_1+B1_1_B2_1 == 1.0<br>
(you could leave out B1_0_B2_0 and make <=, but probably better<br>
branching with ==)<br>
<br>
and corresponding changes to coefficients in constraints.<br>
<br>
That way you add 2 variables and 1 row which is probably better than<br>
adding 1 variable and 3 rows - and will be better for branching.<br>
<br>
Depending on what you are trying to model, you could give weights to<br>
give better branching decisions.<br>
<br>
John Forrest<br>
On 02/10/17 07:10, Bj?rn Sigurd Johansen (Spider Solutions AS) wrote:<br>
> Dear CBC list,<br>
><br>
> Is it possible to multiply two binary variables in the objective function scaled with the same factor?<br>
> E.g.<br>
> MINIMIZE Obj:<br>
> +12.3 B1 * 12.3 B2<br>
> or<br>
> +12.3 B1 * + 12.3 B2<br>
><br>
> If binary variables are set through some sort of branching algorithm, perhaps it is possible? But if the binary variables are set/estimated through some other mechanism, it might not be possible?<br>
><br>
> If possible, what is the exact syntax for doing this?<br>
><br>
> If not possible, I guess the option is to introduce a third binary B3, and set up the following constraints:<br>
> B3 <= B1<br>
> B3 <= B2<br>
> B3 >= B1 + B2 - 1<br>
> And then in the objective function use:<br>
> +12.3 B3<br>
> Correct / best option?<br>
><br>
><br>
> Best regards,<br>
> Bjorn<br>
><br>
> _______________________________________________<br>
> Cbc mailing list<br>
> <a href="mailto:Cbc@list.coin-or.org">Cbc@list.coin-or.org</a><br>
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<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Wed, 4 Oct 2017 10:01:37 +0100<br>
From: John Forrest <<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>><br>
To: <a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a><br>
Subject: Re: [Cbc] Multiplying two binary variables in the objective<br>
function<br>
Message-ID: <<a href="mailto:086502f6-03b7-ad48-9753-a23ef7381638@fastercoin.com">086502f6-03b7-ad48-9753-a23ef7381638@fastercoin.com</a>><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
Whoops - ignore this post - I was not thinking.<br>
<br>
However this will make sense if it is more complicated.<br>
<br>
Special Ordered Sets are very powerful.<br>
<br>
John Forrest<br>
<br>
On 04/10/17 09:57, John Forrest wrote:<br>
> Bjorn,<br>
><br>
> Probably simplest/best to make into Special Ordered Set of type 1 with<br>
> 4 variables<br>
><br>
> B1_0_B2_0, B1_1_B2_0, B1_0_B2_1, B1_1_B2_1<br>
><br>
> with objective values 0.0, 12.3, 12.3, 151.29<br>
><br>
> and constraint<br>
> B1_0_B2_0+B1_1_B2_0+B1_0_B2_1+B1_1_B2_1 == 1.0<br>
> (you could leave out B1_0_B2_0 and make <=, but probably better<br>
> branching with ==)<br>
><br>
> and corresponding changes to coefficients in constraints.<br>
><br>
> That way you add 2 variables and 1 row which is probably better than<br>
> adding 1 variable and 3 rows - and will be better for branching.<br>
><br>
> Depending on what you are trying to model, you could give weights to<br>
> give better branching decisions.<br>
><br>
> John Forrest<br>
> On 02/10/17 07:10, Bj?rn Sigurd Johansen (Spider Solutions AS) wrote:<br>
>> Dear CBC list,<br>
>><br>
>> Is it possible to multiply two binary variables in the objective<br>
>> function scaled with the same factor?<br>
>> E.g.<br>
>> MINIMIZE Obj:<br>
>> +12.3 B1 * 12.3 B2<br>
>> or<br>
>> +12.3 B1 * + 12.3 B2<br>
>><br>
>> If binary variables are set through some sort of branching algorithm,<br>
>> perhaps it is possible?? But if the binary variables are<br>
>> set/estimated through some other mechanism, it might not be possible?<br>
>><br>
>> If possible, what is the exact syntax for doing this?<br>
>><br>
>> If not possible, I guess the option is to introduce a third binary<br>
>> B3, and set up the following constraints:<br>
>> B3 <= B1<br>
>> B3 <= B2<br>
>> B3 >= B1 + B2 - 1<br>
>> And then in the objective function use:<br>
>> +12.3 B3<br>
>> Correct / best option?<br>
>><br>
>><br>
>> Best regards,<br>
>> Bjorn<br>
>><br>
>> _______________________________________________<br>
>> Cbc mailing list<br>
>> <a href="mailto:Cbc@list.coin-or.org">Cbc@list.coin-or.org</a><br>
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>><br>
>><br>
>><br>
><br>
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<br>
<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Wed, 4 Oct 2017 09:57:27 +0000<br>
From: <<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>><br>
To: <<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>><br>
Cc: <a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a><br>
Subject: Re: [Cbc] Increase number of digits in solution file<br>
Message-ID:<br>
<<a href="mailto:85c590bb9b9c4372896d567f4856b4d3@DP07CEXC16.MELINDA.LOCAL">85c590bb9b9c4372896d567f4856b4d3@DP07CEXC16.MELINDA.LOCAL</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Thank you very much.<br>
It works perfectly !<br>
<br>
Nicolas<br>
<br>
De : John Forrest [mailto:<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>]<br>
Envoy? : mercredi 4 octobre 2017 10:19<br>
? : Derhy Nicolas (ENGIE SA) <<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>><br>
Cc : <a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a><br>
Objet : Re: [Cbc] Increase number of digits in solution file<br>
<br>
Nicolas,<br>
<br>
Give up and do it the incorrect way. Don't try and define CLP_OUTPUT_FORMAT.<br>
<br>
Go to line 58 (about) in CbcSolver.cpp and change the line<br>
<br>
#define CLP_OUTPUT_FORMAT %15.8g<br>
<br>
to whatever you want.<br>
<br>
John Forrest<br>
<br>
On 03/10/17 14:01, <a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>> wrote:<br>
Hi,<br>
<br>
I followed your advice and I tried to add #define CLP_OUTPUT_FORMAT "%20.12g" in Clp/src/config_default.h but it has no effect.<br>
Then I tried to change compile parameters but did not know exactly what to do : I modified preprocessor definitions by adding CLP_OUTPUT_FORMAT=%20.12g; but no effect.<br>
I tried with quote (CLP_OUTPUT_FORMAT=?%20.12g?;), I tried on different vs projects (cbc, libCbc and libClp) but it was unsuccessful?<br>
When I watch the resulting command line, it seems that percent symbol is not well recognized because I obtain : /D "CLP_OUTPUT_FORMAT=\" .12g\""<br>
<br>
If anyone can give me more details, it would be great !<br>
<br>
Nicolas<br>
<br>
De : Fausto Richetti Blanco [mailto:<a href="mailto:fausto.blanco@gmail.com">fausto.blanco@gmail.com</a>]<br>
Envoy? : jeudi 21 septembre 2017 18:59<br>
? : John Forrest <<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>><mailto:<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>><br>
Cc : Derhy Nicolas (ENGIE SA) <<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>><mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>>; cbc <<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>><mailto:<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>><br>
Objet : Re: [Cbc] Increase number of digits in solution file<br>
<br>
I think you can add -DCLP_OUTPUT_FORMAT ="%20.12g" to the compiler parameters in the project settings of visual studio<br>
<br>
On Thu, Sep 21, 2017 at 1:05 PM, John Forrest <<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a><mailto:<a href="mailto:john.forrest@fastercoin.com">john.forrest@fastercoin.com</a>>> wrote:<br>
Nicolas,<br>
<br>
I only use Linux, so maybe someone else can help.<br>
<br>
I think that for Visual Studio you have to modify Clp/src/config_default.h by hand. If so then I would try adding #define CLP_OUTPUT_FORMAT ="%20.12g". I am not sure if you need the "". I hope someone will correct me if I am wrong.<br>
<br>
John Forrest<br>
On 21/09/17 14:24, <a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>> wrote:<br>
Hi John,<br>
<br>
Can you explain me how to do this ?<br>
I have downloaded source code and I compiled it successfully (using Visual Studio 2010).<br>
I found some CXXDEFS in the configure file but I do not know what to modify.<br>
<br>
Nicolas<br>
<br>
De : Cbc [mailto:<a href="mailto:cbc-bounces@coin-or.org">cbc-bounces@coin-or.org</a>] De la part de John Forrest<br>
Envoy? : mardi 19 septembre 2017 18:57<br>
? : <a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a><mailto:<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>><br>
Objet : Re: [Cbc] Increase number of digits in solution file<br>
<br>
Nicolas,<br>
<br>
When you configure cbc add to CXXDEFS<br>
<br>
-DCLP_OUTPUT_FORMAT ="%20.12g"<br>
<br>
or whatever you want.<br>
<br>
John Forrest<br>
<br>
On 19/09/17 16:02, <a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>> wrote:<br>
Hi everybody,<br>
<br>
I often use cbc exe. It works very well and each time I use it, I add to the command line ?-solution mySolution.txt? in order to recuperate the optimal solution.<br>
My problem is that the values stored in the solution file lacked sometimes of precision when I need a lot of digits.<br>
For example, I recently obtained 1.5596969e+008 whereas I was hoping for 155969687.<br>
<br>
I tried several options like ?output but I did not find any option that will fit my expectations.<br>
Is there a way to increase the number of digits in solution file ?<br>
<br>
Nicolas<br>
<br>
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