Lazy constraint callbacks in R?

Answered

Velibor Misic

Hi there,

I was just curious if there is a way to add lazy constraint callbacks to problems that are created/solved using the Gurobi R interface?

Thank you in advance for your help!

Velibor

Comments

5 comments

Official comment
Simranjit Kaur
Gurobi Staff

December 06, 2024 00:59
This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
Jakob Schelbert

April 29, 2019 08:20
Hi Velibor,

As far as I know, the R-API does not permit adding lazy constraints. This is also true for the Matlab-API - both are more "matrix based" interfaces compared to the other APIs.
0
Gwyneth Butera
Gurobi Staff

May 21, 2019 21:18
As a note of clarification, while you can't use the callback, you can mark linear constraints as lazy in the R and MATLAB APIs via the 'lazy' attribute on a linear constraint.
0
Marcos Freitas

December 09, 2020 04:15
Does anyone know if it's still not possible?
0
Eli Towle
Gurobi Staff

December 09, 2020 04:41
Callback functions are still not supported in the MATLAB and R interfaces. To add lazy constraints in these APIs, you can use Gwyneth's approach of setting the Lazy attributes of linear constraints.
1

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