Friday, October 28, 2016

GAMS Modeling: Inventing Set Element Labels

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I often see models with set elements 1,2,…. Here is an example: Of course if we have real data often we can use real names. But in some ca...
Thursday, October 27, 2016

Gurobi 7

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Gurobi Optimizer 7.0 Now Available This release offers significantly higher performance and powerful new modeling capabilities, among oth...
Wednesday, October 26, 2016

A MIP Machine?

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http://news.stanford.edu/2016/10/20/stanford-researchers-create-new-special-purpose-computer/

Short RStudio Notebook Demo

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Sunday, October 23, 2016

Optimization of p*q: price and quantity

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When doing revenue optimization we need to take into account the price elasticity of demand. Not sure if this publisher has a good handle on...
Friday, October 21, 2016

ROML: R Optimization Modeling Language

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From: https://rdrr.io/rforge/ROML/ : Utilizing the possibilities of R's lazy evaluation ROML provides an algebraic optimization modeli...
Thursday, October 20, 2016

Excel and very large data files

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Tables with many rows (much more than the one million row limit in Excel) can be loaded in Excel’s Power Pivot Data Model. Here is an exampl...
Wednesday, October 19, 2016

Microsoft Open Sources Gradient Boosting Machine code

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Microsoft abandoned their MS Solver Foundation framework, now focusing on machine learning (and R) ? https://github.com/Microsoft/LightGBM...

Commercial Vehicle Routing

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Source An interesting approach to provide vehicle routing services is: https://routific.com/ . You send a spreadsheet with the data (addres...
Tuesday, October 18, 2016

MIP Modeling: if constraint

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From http://cs.stackexchange.com/questions/51025/cast-to-boolean-for-integer-linear-programming/51089#51089 could you please explain the ...