scalanlp/breeze

Mixed-integer solver

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#600 opened on Oct 14, 2016

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 (2 comments) (1 reaction) (0 assignees)Scala (3,453 stars) (690 forks)batch import
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Description

Is there a way to define a LinearProgram to have some/all variables to be Integer? I can't find any solvers other than the Apache Simplex (there is a BreachAndBound class, but it seems to be a stub). If not, is there any workaround to run an integer based optimization?

Contributor guide

Tech stack
scala
Domain
data
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
ScalaBreeze LinearProgramoptimization basicsmixed integer programming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
The issue requests integer variable support in Breeze's LinearProgram. The existing BreachAndBound class is a stub. Investigate the LinearProgram class and the simplex solver to understand the current structure. Research branch and bound algorithms and how to integrate them with the existing solver. The maintainers have not provided detailed guidance, so start by reading the source code and any relevant tests.
Mixed-integer solver · scalanlp/breeze#600 | Good First Issue