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4 results for “from:Liu Evans, Gareth”

global optimisation with inequality constraints
Liu Evans, Gareth · Sep 8, 2011 · r-help

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Linear programming problem, RGPLK - "no feasible solution"
Liu Evans, Gareth · Oct 7, 2011 · r-help

Dear All, RGLPK says that there is no feasible solution but I think there should be. In a more general setup with more variables, where we know the feasible solution analytically, it also says there is no feasible solution. I...

Linear programming problem, RGPLK - "no feasible solution".
Liu Evans, Gareth · Oct 10, 2011 · r-help

In my post at https://stat.ethz.ch/pipermail/r-help/2011-October/292019.html I included an undefined term "ej". The problem code should be as follows. It seems like a simple linear programming problem, but for some reason...

minimisation problem, two setups (nonlinear with equality constraints/linear programming with mixed constraints)
Liu Evans, Gareth · Oct 3, 2011 · r-help

Dear All, Thank you for the replies to my first thread here: http://r.789695.n4.nabble.com/global-optimisation-with-inequality-constraints-td3799258.html. So far the best result is achieved via a penalised objective function. This was suggested...

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