Il giorno lunedì 30 marzo 2015 21:45:13 UTC+2, Miles Lubin ha scritto: > > Hi Michela, >
> It looks like you're referring to JuMP, in which case: > > @defVar(m, a <= x <= b, SemiCont) > > should do the trick. See also the documentation: > http://jump.readthedocs.org/en/release-0.8/refvariable.html?highlight=semicontinuous > > We prefer to direct optimization-related questions to julia-opt > <https://groups.google.com/forum/#!forum/julia-opt>, for future reference. > > Best, > Miles > > On Monday, March 30, 2015 at 3:36:15 PM UTC-4, Kevin Squire wrote: >> >> Hi Michela, >> >> I think you're going to need to provide some additional information. Are >> you modeling this in JuMP by chance? >> >> Cheers, >> Kevin >> >> On Mon, Mar 30, 2015 at 12:25 PM, Michela Di Lullo < >> [email protected]> wrote: >> >>> Hallo everyone! >>> >>> how do I model a variable (array of variables) that can either be zero >>> or in some range not containing zero? >>> e.g. x∈0∪[a,b] where a>0 >>> >>> Thank you in advance for any information! >>> >> >>> Michela >>> >> >> Yes, exactly.. I'm working with JuMP. I need to model a matrix of semicontinuos power variables p[i,j] that assume values in *0 union [pt_min,pt_max]* In other words it's: for i=1:gmax {@defVar(m, inf[i]<= pt[1:hmax] <=sup[i], SemiCont)} end but pt can also be equal to 0 !! How do I model it? Thanks to anyone will answer
