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Hi, I am a beginner of R. There is a question about constraint minimization. A function, y=f(x1,x2,x3....x12), needs to be minimized. There are 3 requirements for the minimization: (1) x2+x3+...+x12=1.5 (x1 is excluded); (2) x1=x3=x4; (3) x1, x3 and x5 are in the range of -1~0, respectively. The rest variables (x2, x4, x6, x7, ...., x12) are in the range of 0~1, respectively. The

...eliminating > x3, x4, and x12 ? > (2) x4 (being equal to x1) has to be in [-1, 0] but also in [0, 1]? > (3) If you need to restrict x12 to [0, 1] also, you cannot eliminate it. > Either keep x12 and use an equality constraint, or use inequality > constraints on xxlr. > > Hans Werner > > ______________________________________________ > [hidden email] <http://user/SendEmail.jtp?type=node&node=3051338&i=0>mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/...