[Cmpl] Convert GMPL to CMPL

[Schroeder, Rob]

Hi Mike,
That seems to works great – thank you.  Now… on to the rest of my model ☺

I appreciate all the effort you have put into this project.  I think it will be quite useful.

Regards,
Rob



From: Mike Steglich [mailto:mike.steglich at th-wildau.de]
Sent: Saturday, June 11, 2016 5:15 AM
To: Schroeder, Rob
Cc: cmpl at list.coin-or.org
Subject: Re: [Cmpl] Convert GMPL to CMPL

Hi Rob,

Thank you for beeing interested in Cmpl.

I would create a parameter vector Rp defined over the set Products which contains sets of rolls (sub sets of Rolls) that can be used for the product p.

{ p in Products :  Rp[p]:= set { r in Rolls, pWidth[p] <= rWidth[r]: r} ; }

I could not test it because I'm off and writing this on my pad.

Thanks,

Mike

Am 10.06.2016 um 20:32 schrieb Schroeder, Rob <Rob.Schroeder at graphicpkg.com<mailto:Rob.Schroeder at graphicpkg.com>>:
Hi,
I am trying to port a small roll assortment problem from GMPL to CMPL.  I am modelling it as an assignment problem for now.

I have a set of PRODUCTS with widths as defined in the parameter pWidth, and a set of parent ROLLS with width rWidth.  My set Rp is an indexed set of parent rolls that can be used to produce product p.

Here’s what I use in GMPL:

set Rp{p in PRODUCTS} := {r in ROLLS : pWidth[p] <= rWidth[r]};

so Rp[p] will contain all the parent rolls that are wider than the width of product p.

I am trying to figure out how to replicate this in CMPL.

Any pointers will be apprecaited.

Regards,
Rob
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