Dear Cathy, a few comments to your question:
a) If you want a (linear or non-linear) optimization you need an objective function that you want to minimize or maximize. b) There is no unique solution for your problem. c) In you case you should use algebra rather than a computer. This gives following solution: X1 = 1/8; X2 = 7/8 - X3 with X3 in (7/16, 3/4) => X2 in (1/8, 7/16) Arne On Friday 05 May 2006 03:58, cathy_chien wrote: > Dear all, > > I am trying to find a solution satisfying the below equations > > in R. > > > Set up the problem > > 9 X1+ X2 + X3 = 2 > X1+ X2 + X3 = 1 > > which is subjected to > > 0 < X1 < X2 < X3 < 2. > > I have downloaded the packages \'linprog\' and \'lpSolve\' but can > > not see how to solve the question. > > > Thank you for your help. > > > With Best, > > Cathy > > ========================================================== > 五月電腦職訓限額50名 > http://edm-prg.epaper.com.tw/click.php?ad_code=1196890 > ========================================================== > SkypeOut 打美加0.7元/分 打大陸0.9元/分 立即購買>> > http://skype.pchome.com.tw/skypeout.htm -- Arne Henningsen Department of Agricultural Economics University of Kiel Olshausenstr. 40 D-24098 Kiel (Germany) Tel: +49-431-880 4445 Fax: +49-431-880 1397 [EMAIL PROTECTED] http://www.uni-kiel.de/agrarpol/ahenningsen/ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
