> Yes, you can use indexation like some_oovar[i] or some_oofun[i] > (probably with several indexes, or negative ones that are start from > array end), however, I think it should be avoided if possible (you'd > better split your oovar into several > oovars).http://www.openopt.org/FuncDesignerDoc#Some_issues_to_be_aware
I sent a message on sage-support to know to which extent I could use multivariate Polynomials in Sage to represent constraints and Linear functions, but it seems to be troublesome... This said, there is no way for me to use Linear Programming if I can not use indexed variables... At the moment, even though the syntax could be tremendously improved, I can use any hashable Sage object as a variable, and most of the time in Graph theoretic function my variables are edges, vertices, or arbitrary tuples and strings. Anyway, most of the Linear Programs are generated from graphs and I have to find a way to let a computer create as many variables as possible :-/ The current syntax, though, is not nearly satisfying. > Maybe I have translated it wrong with my small knowledge of English. I'm french. We bear the same cross ;-) > I had awared of OSI, but I'm not skilled in connecting code of other > languages to Python, that's why I hadn't go for it. > > This is very nice to hear, still I think it would be better to provide > Python-OSI API instead of SAGE-OSI, it would benefit more wield > auditory (PythonXY, EPD, mere Python-scipy users etc). Of course, it's > up to you - mb you are SAGE developer at first. I'm sorry to give you this "cheap" an answer, but if anyone wants to write such code, it will always be available as it is GPL-Licensed. I am not particularly interested in LP, I just began to write these interfaces because I thought the Graph functions I needed would be much harder to write otherwise, and often less effective. I just wrote a shortcut. Now, if LP can be of independent interest in Sage, why not spending some time over it as I know how it works ? Besides, in Sage I only have to care about the stuff that interests me... If I need symbolics, plots, interfaces, I can ask people whose interest lies there and they'll give me answer, sometimes solutions. If they need anything dealing with Graphs, I'll do what I can. Pretty naive, but so relieving :-) Regards, Nathann --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
