Dear Richard, It is funny. I have to perform the approach of sediment fingerprinting for my master thesis. Mr. Hasselman gave me the advice to take a closer look into the limSolve package a few days ago. http://cran.r-project.org/web/packages/limSolve/index.html
I guess, the lsei-function of this package is exactly what you and i are looking for. I have tried it out today and compared the lsei-results with the results of the MS-Excel solver. They are the same! You will find in the manual (Chemtax example), how to define the constraints, that every unknown is >= 0 and the sum of unknowns is always 1. http://cran.r-project.org/web/packages/limSolve/limSolve.pdf Try to get familiar with the lsei-function and if you still need help, i can send you my code. Bearing the Monte-Carlo simulation in mind, the package could offer some nice functions too. Have a nice day and best regards Thomas -- View this message in context: http://r.789695.n4.nabble.com/Optimization-in-R-similar-to-MS-Excel-Solver-tp4646759p4646911.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
