This is a linear programming problem. Although I am not sure what your objective function is!!
Check out the R package linprog -----Original Message----- From: Andrej Uduc [mailto:[EMAIL PROTECTED] Sent: 16 September 2004 10:29 To: [EMAIL PROTECTED] Subject: [R] newbie needs help using R as solver Greetings I'm a total newbie in R and I'm trying to make a comparisson of Excel and R in the fields of: - optimisation modeling (using solver) - decision trees - simulation modeling as described in Winston, Wayne L.: Practical Management Science. for optimisation modeling in Excel I would normaly use solver. In R however I can't seem to be able to find the solution. I've narrowed it down to optim, optimize functions (I might be totaly wrong), but I can't figure out how to set the conditions. I've read something about nlm model but I can't find the anwser (examples are not easy enough for me). what I wanna do is solve this simple task: a+b =< 500000 c+d =< 500000 g >= 0,25*c+d a+b+c+d+g =< 1000000 a, b, c, d, g => 0 I would very much appreciate any help in this matter. I need to locate the appropriate function for the task and figure out how to write this formulas. I'd also be very thankfull for any help (links) to simple examples of decision trees and/or simulation. Andrej Udu� ______________________________________________ [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 KSS Ltd Seventh Floor St James's Buildings 79 Oxford Street Manchester M1 6SS England Company Registration Number 2800886 Tel: +44 (0) 161 228 0040 Fax: +44 (0) 161 236 6305 mailto:[EMAIL PROTECTED] http://www.kssg.com The information in this Internet email is confidential and m...{{dropped}} ______________________________________________ [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
