# \#conic

**URL:** https://discuss.ampl.com/tag/conic/49.md

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## [AMPL Modeling Tips #7: Logistic Regression with Exponential Cones](https://discuss.ampl.com/t/ampl-modeling-tips-7-logistic-regression-with-exponential-cones/657)

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**Author:** [@fdabrandao](https://discuss.ampl.com/u/fdabrandao)\
**Replies:** 0\
**Last updated:** [July 27, 2023, 12:08pm UTC](https://discuss.ampl.com/t/ampl-modeling-tips-7-logistic-regression-with-exponential-cones/657 "2023-07-27T12:08:44Z")

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Given a sequence of training examples x\_i \\in \\mathbf{R}^m, each labelled with its class y\_i\\in \\{0,1\\} and we seek to find the weights \\theta \\in \\mathbf{R}^m which maximize the function: \\sum\_{i:y\_i=1} \\log(S(\\theta^…

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## [AMPL Modeling Tips #6: Robust Linear Programming with Ellipsoidal Uncertainty](https://discuss.ampl.com/t/ampl-modeling-tips-6-robust-linear-programming-with-ellipsoidal-uncertainty/487)

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**Author:** [@fdabrandao](https://discuss.ampl.com/u/fdabrandao)\
**Replies:** 0\
**Last updated:** [April 10, 2023, 4:34pm UTC](https://discuss.ampl.com/t/ampl-modeling-tips-6-robust-linear-programming-with-ellipsoidal-uncertainty/487 "2023-04-10T16:34:31Z")

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Sometimes values are not known exactly In the diet problem we want to find a diet that satisfies certain nutricial requiments while also minimizing the total cost. What if the costs were not know exactly? One simple …