<div dir="ltr">Hi Bjorn,<div><br></div><div>you can use high-level modeling languages which interface CBC and take care of non-linearities and global constraints.</div><div><br></div><div>Gleb</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 4 October 2017 at 20:57,  <span dir="ltr"><<a href="mailto:cbc-request@coin-or.org" target="_blank">cbc-request@coin-or.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send Cbc mailing list submissions to<br>
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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>
------------------------------<wbr>------------------------------<wbr>----------<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-<wbr>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+<wbr>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>
> ______________________________<wbr>_________________<br>
> Cbc mailing list<br>
> <a href="mailto:Cbc@list.coin-or.org">Cbc@list.coin-or.org</a><br>
> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_mailman_listinfo_cbc&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=js2M0T-3OIMIVDvokcKjokJbk0F8QOCd0mT4FsVFE88&m=hM8BKlgl1z5yzxrZnxtYfw_AEAZDyQOjfvWFs39qJLk&s=DDn3zh-jLSVoNRCQal3m7LVGxVLHAnUxaImDCAH-088&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint.<wbr>com/v2/url?u=https-3A__list.<wbr>coin-2Dor.org_mailman_<wbr>listinfo_cbc&d=DwICAg&c=Ngd-<wbr>ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLx<wbr>WPA_2Wlc4&r=js2M0T-<wbr>3OIMIVDvokcKjokJbk0F8QOCd0mT4F<wbr>sVFE88&m=<wbr>hM8BKlgl1z5yzxrZnxtYfw_<wbr>AEAZDyQOjfvWFs39qJLk&s=DDn3zh-<wbr>jLSVoNRCQal3m7LVGxVLHAnUxaImDC<wbr>AH-088&e=</a><br>
><br>
><br>
<br>
<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-<wbr>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+<wbr>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>
>> ______________________________<wbr>_________________<br>
>> Cbc mailing list<br>
>> <a href="mailto:Cbc@list.coin-or.org">Cbc@list.coin-or.org</a><br>
>> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_mailman_listinfo_cbc&d=DwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=js2M0T-3OIMIVDvokcKjokJbk0F8QOCd0mT4FsVFE88&m=hM8BKlgl1z5yzxrZnxtYfw_AEAZDyQOjfvWFs39qJLk&s=DDn3zh-jLSVoNRCQal3m7LVGxVLHAnUxaImDCAH-088&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint.<wbr>com/v2/url?u=https-3A__list.<wbr>coin-2Dor.org_mailman_<wbr>listinfo_cbc&d=DwICAg&c=Ngd-<wbr>ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLx<wbr>WPA_2Wlc4&r=js2M0T-<wbr>3OIMIVDvokcKjokJbk0F8QOCd0mT4F<wbr>sVFE88&m=<wbr>hM8BKlgl1z5yzxrZnxtYfw_<wbr>AEAZDyQOjfvWFs39qJLk&s=DDn3zh-<wbr>jLSVoNRCQal3m7LVGxVLHAnUxaImDC<wbr>AH-088&e=</a><br>
>><br>
>><br>
>><br>
><br>
> ______________________________<wbr>_________________<br>
> Cbc mailing list<br>
> <a href="mailto:Cbc@list.coin-or.org">Cbc@list.coin-or.org</a><br>
> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_mailman_listinfo_cbc&d=DwIGaQ&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=js2M0T-3OIMIVDvokcKjokJbk0F8QOCd0mT4FsVFE88&m=ru7IvQS__wCzcWuZWyT4Z2N1gBq46p_PvS1qpe7c7kE&s=gid7kHY0HNYvNE3hIAYt-AEm7zAZJgX7A1W17kdk7mQ&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint.<wbr>com/v2/url?u=https-3A__list.<wbr>coin-2Dor.org_mailman_<wbr>listinfo_cbc&d=DwIGaQ&c=Ngd-<wbr>ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLx<wbr>WPA_2Wlc4&r=js2M0T-<wbr>3OIMIVDvokcKjokJbk0F8QOCd0mT4F<wbr>sVFE88&m=ru7IvQS__<wbr>wCzcWuZWyT4Z2N1gBq46p_<wbr>PvS1qpe7c7kE&s=<wbr>gid7kHY0HNYvNE3hIAYt-<wbr>AEm7zAZJgX7A1W17kdk7mQ&e=</a><br>
><br>
><br>
<br>
<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>
        <<wbr>85c590bb9b9c4372896d567f4856b4<wbr>d3@DP07CEXC16.MELINDA.LOCAL><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@<wbr>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><<wbr>mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><wbr>> 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?;)<wbr>, 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.<wbr>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>><<wbr>mailto:<a href="mailto:john.forrest@fastercoin.com">john.forrest@<wbr>fastercoin.com</a>><br>
Cc : Derhy Nicolas (ENGIE SA) <<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a>><<wbr>mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><wbr>>; cbc <<a href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>><mailto:<a href="mailto:cbc@list.coin-or.org"><wbr>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><<wbr>mailto:<a href="mailto:john.forrest@fastercoin.com">john.forrest@<wbr>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><<wbr>mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><wbr>> 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.<wbr>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">cb<wbr>c@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><<wbr>mailto:<a href="mailto:nicolas.derhy@engie.com">nicolas.derhy@engie.com</a><wbr>> 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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Subject: Digest Footer<br>
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End of Cbc Digest, Vol 122, Issue 7<br>
******************************<wbr>*****<br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Dr Gleb Belov       Monash University     
 +61 3 9903 1622<br>
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