Xpress-MP Google Group

The Xpress community has moved

chris.oak...@dashoptimization.com (ChrisOakley) — Tue, 06 June 2009 14:15:13 UT

This Xpress community forum has been relocated to the FICO Decision
Management Community.

We hope that you will join us there to post questions, comments, ideas
and engage in discussion related to Xpress, Optimization and the wider
area of Decision Management.

Stochastic Programming Module

eejriets...@gmail.com (Eelco) — Sun, 06 June 2009 17:07:41 UT

Hi all,

I have been using the "mmsp" module for solving a multistage recourse
model. I have been searching on the website to find the underlying
algorithm(s) that are used by this module. Can anyone help?
I believe that the recourse model is reset as a large scale LP
equivalent en solved accordingly. Is this correct?

Re: XpressMP on Leopard

vimek...@gmail.com (vimek vanamali) — Thu, 06 June 2009 19:59:20 UT

install and keep another OS just to run Xpress"
yes i agree with u 100%..But...,,Try Vmware in linxu so that u can switch
into WIN/Linux at the same time....To use Vmware u will have to enable the
VT option in your motherboard.

Re: XpressMP on Leopard

dacat...@ulb.ac.be (Daniele Catanzaro) — Wed, 06 June 2009 14:40:02 UT

Dear Chris and Vimek

Thanks for yours answers. I confess it's a bit uncomfortable to
install and keep another OS just to run Xpress, but since I love
Xpress and
since it is much faster than Cplex 11.0 for Mac OS X, I have no choice.
All the best,

Daniele

--
Dr. Daniele Catanzaro,

Re: XpressMP on Leopard

vimek...@gmail.com (vimek vanamali) — Wed, 06 June 2009 14:08:33 UT

USE WINE TO INSTALL WIN APPLICATION INTO LINUX

Re: XpressMP on Leopard

chris.oak...@dashoptimization.com (ChrisOakley) — Wed, 06 June 2009 13:29:24 UT

There are no plans to port Xpress to the Mac, although we would
certainly consider it if there were enough commercial interest.

Chris.

E-1013 Infeasible constraint

sfonne...@gmail.com (Sebastian) — Tue, 05 May 2009 17:39:55 UT

I'm getting the error E-1013 Infeasible constraint in my model with
code on line 78: "sum(l in T)M(i,l,1)*l+sum(j in E,l in T)P(i,j,l,1)
*l>=Es(i)" How can I solve this?

This is the code for my model=

model Carpool
uses "mmxprs"; !gain access to the Xpress-Optimizer solver

!optional parameters section

XPRS_TOP and XPRS_LIN

anaramo...@gmail.com (Ana Ramos) — Sun, 05 May 2009 17:08:28 UT

Hello

What is the difference between XPRS_TOP and XPRS_LIN?

Thanks

XpressMP on Leopard

dacat...@ulb.ac.be (Daniele Catanzaro) — Fri, 05 May 2009 14:07:37 UT

Dear Madam, Sir

may I ask you whether there is any chance to see XpressMP running on
Mac Os X in the next months?

I do not refer explicitly about the porting of Xpress-Ive (which
however make the development really easy), what is
really important to me is the possibility to use XpressMP on mac os x

Converting a string to numeric?

zuhair.abdu...@gmail.com (Zee) — Mon, 05 May 2009 18:32:33 UT

Hi guys

I need some help. I have a file with both numeric and character data.
and i imported these to a 2d array(of type string) in mosel.

Now, this is what I wanna try...

Can I access a column from this array and then extract the numeric
value (in effect i wanna convert the string type info to numeric data

Re: PLZZZZZZZZZ HELP

ov.mig...@googlemail.com (Miguel O-V) — Mon, 05 May 2009 17:23:06 UT

I am not sure if I did understand the question... but if what you want
is to load an array from a dat file you can do it by means of for
loops as:

forall(a in 1..A,b in 1..B) do
read(D(a,b))
end-do

You do not need to strictly start from 1.

Re: xPress Mosel IVE!

m.margreit...@gmx.at (Mags) — Tue, 04 Apr 2009 08:24:14 UT

Hey!

Please, if somebody knows anything to this problem, help me!

Best regards,

Mags

Interpretation of the Solution

peterschr...@googlemail.com (peterschrube@googlemail.com) — Wed, 04 Apr 2009 17:01:02 UT

Hi,

I have used Xpress in my dissertation and must interpret my results
properly. In the book as well as in the net I could find nothing the
fitting, for this reason the last attempt is to write here.

Please, explain me how to interpret the Rows (constrains), Columns
(variable), Non-zero elements as well as Simplex iterationens.

Interpretation of the Solution

peterschr...@googlemail.com (peterschrube@googlemail.com) — Wed, 04 Apr 2009 16:59:59 UT

Hi,

I have used Xpress in my dissertation and must interpret my results
properly. In the book as well as in the net I could find nothing the
fitting, for this reason the last attempt is to write here.

Please, explain me how to interpret the Rows (constrains), Columns
(variable), Non-zero elements as well as Simplex iterationens.

RE: Optimization Libraries Student Version

chrisoak...@fairisaac.com (Oakley, Chris) — Wed, 04 Apr 2009 10:20:34 UT

The library APIs are currently only available through the Academic Partner Program which grants full licenses of the software to degree awarding institutes that teach at least one course with Xpress.

On Windows, some access to the solver API is provided as part of the Microsoft Solver Foundation v1.2 which will be released this week.