Optim uses vectors of _parameters_, not of data. You add a (likelihood) function, give initial values of the parameters, and get the optimized parameters back. See ?optim and the examples therein. It contains an example for optimization using multiple data columns.
Cheers Joris On Fri, Jun 25, 2010 at 8:12 AM, confusedSoul <ruchir_402...@infosys.com> wrote: > > I am trying to estimate an Arrhenius-exponential model in R. I have one > vector of data containing failure times, and another containing > corresponding temperatures. I am trying to optimize a maximum likelihood > function given BOTH these vectors. However, the optim command takes only > one such vector parameter. > > How can I pass both vectors into the function? > -- > View this message in context: > http://r.789695.n4.nabble.com/Optimizing-given-two-vectors-of-data-tp2268002p2268002.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. > -- Joris Meys Statistical consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control tel : +32 9 264 59 87 joris.m...@ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php ______________________________________________ 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.
