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<div class="moz-cite-prefix">Yes, I can generate a complete feasible
solution heuristically. By complete, I mean I have access to<br>
the values of all the variables including the variables composing
the SOS2 constraints. <br>
<br>
I would like to provide this solution to mipStart in a hope to
improve the resolution time of my problem.<br>
<br>
I will send you some files ASAP<br>
<br>
On 2015-05-20 7:27 AM, <a class="moz-txt-link-abbreviated" href="mailto:cbc-request@list.coin-or.org">cbc-request@list.coin-or.org</a> wrote:<br>
</div>
<blockquote
cite="mid:mailman.44.1432128426.8799.cbc@list.coin-or.org"
type="cite">
<pre wrap="">Send Cbc mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Cbc digest..."
Today's Topics:
1. Re: Cbc Digest, Vol 95, Issue 6 (Alexis)
2. Re: Cbc Digest, Vol 95, Issue 6 (John Forrest)
3. Re: Cbc Digest, Vol 95, Issue 6 (Haroldo Gambini Santos)
----------------------------------------------------------------------
Message: 1
Date: Tue, 19 May 2015 12:56:16 -0600
From: Alexis <a class="moz-txt-link-rfc2396E" href="mailto:aguigue@softree.com"><aguigue@softree.com></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>
Subject: Re: [Cbc] Cbc Digest, Vol 95, Issue 6
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:555B8750.3010300@softree.com"><555B8750.3010300@softree.com></a>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"
Thanks John
I have done preliminary testing of mipStart using standalone cbc. It
looks promising.
However, our real problems have a bunch of SOS2 constraints. I checked
but it does not
seems that cbc v2.9.0 can import/read such files yet, am I correct? The
other
thing I was wondering is that whether mipStart would work with SOS2
constraints?
Say we have a lp problem with binary variables and some SOS2
constraints, would
mipStart work by, again, just providing the values of the binary
variables, and
leaving the variables in the SOS2 constraints to be decided?
Also, is there some doc/pub about Haroldo implementation/method?
Thanks in advance
Alexis
On 2015-05-13 10:00 AM, <a class="moz-txt-link-abbreviated" href="mailto:cbc-request@list.coin-or.org">cbc-request@list.coin-or.org</a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Send Cbc mailing list submissions to
<a class="moz-txt-link-abbreviated" href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>
To subscribe or unsubscribe via the World Wide Web, visit
<a class="moz-txt-link-freetext" href="http://list.coin-or.org/mailman/listinfo/cbc">http://list.coin-or.org/mailman/listinfo/cbc</a>
or, via email, send a message with subject or body 'help' to
<a class="moz-txt-link-abbreviated" href="mailto:cbc-request@list.coin-or.org">cbc-request@list.coin-or.org</a>
You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Cbc digest..."
Today's Topics:
1. Re: Cbc Digest, Vol 95, Issue 5 (Alexis)
2. Re: Cbc Digest, Vol 95, Issue 5 (John Forrest)
----------------------------------------------------------------------
Message: 1
Date: Tue, 12 May 2015 11:09:58 -0600
From: Alexis <a class="moz-txt-link-rfc2396E" href="mailto:aguigue@softree.com"><aguigue@softree.com></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>
Subject: Re: [Cbc] Cbc Digest, Vol 95, Issue 5
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:555233E6.8030501@softree.com"><555233E6.8030501@softree.com></a>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"
Thanks John.
I am actually using the API. I found this example
<a class="moz-txt-link-freetext" href="https://projects.coin-or.org/Cbc/browser/trunk/Cbc/examples/hotstart.cpp">https://projects.coin-or.org/Cbc/browser/trunk/Cbc/examples/hotstart.cpp</a>
I will try it. Is the example you were referring to?
On 2015-05-12 10:00 AM, <a class="moz-txt-link-abbreviated" href="mailto:cbc-request@list.coin-or.org">cbc-request@list.coin-or.org</a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Send Cbc mailing list submissions to
<a class="moz-txt-link-abbreviated" href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>
To subscribe or unsubscribe via the World Wide Web, visit
<a class="moz-txt-link-freetext" href="http://list.coin-or.org/mailman/listinfo/cbc">http://list.coin-or.org/mailman/listinfo/cbc</a>
or, via email, send a message with subject or body 'help' to
<a class="moz-txt-link-abbreviated" href="mailto:cbc-request@list.coin-or.org">cbc-request@list.coin-or.org</a>
You can reach the person managing the list at
<a class="moz-txt-link-abbreviated" href="mailto:cbc-owner@list.coin-or.org">cbc-owner@list.coin-or.org</a>
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Cbc digest..."
Today's Topics:
1. Hot Start for MIP (Alexis)
2. Re: Hot Start for MIP (John Forrest)
----------------------------------------------------------------------
Message: 1
Date: Mon, 11 May 2015 11:07:35 -0600
From: Alexis <a class="moz-txt-link-rfc2396E" href="mailto:aguigue@softree.com"><aguigue@softree.com></a>
To: <a class="moz-txt-link-abbreviated" href="mailto:cbc@list.coin-or.org">cbc@list.coin-or.org</a>
Subject: [Cbc] Hot Start for MIP
Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:5550E1D7.8030902@softree.com"><5550E1D7.8030902@softree.com></a>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I have got a large MIP to solve for which I would like to implement a
hot start strategy.
My understanding is that I should use the function
CbcModel::setHotstartSolution(const double *solution, const int
*priorities=NULL),
where solution assumes the same ''order'' of variables as defined for
the model itself. I am not so sure to understand the meaning of
the pointer priorities though. The hotstart solution I intend to give is
an actual feasible solution to the MIP.
Am I on the right track?
Thanks in advance for the help
</pre>
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<br>
<div class="moz-signature">-- <br>
Alexis Guigue, E.I.T., B.Eng., M.A.Sc., Ph.D. <br>
Software Engineer/Research Engineer <br>
<a href="aguigue@softree.com">aguigue@softree.com</a> <br>
604-519-6222, ext. 3 <br>
<br>
<a href="http://www.softree.com">Softree Technical Systems Inc.</a>
<br>
Engineering an Easier Way <br>
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