On 24-10-2012, at 10:04, pina <pina....@hotmail.it> wrote: > Hi, > > I'm Pina and I'm a student in geology. I'm working with spectral profile of > sand and I have to find the similarity between one spectral profile selected > by hyperspectral image anche one that I created to mix different percentage > of 4 mineral component. I have to find the best mix of percentage of this 4 > mineral in order to have the best likeness with the spectral profile chose > by hyperspectral image. Untill now I worked with excel using the function > equation solver to find the best fit but I 'd like to know if is possible do > this operation working in R.
It looks like you need something that can do optimization. R provides optim() and nlminb(). A similar question was posted several days ago. See http://r.789695.n4.nabble.com/Optimization-in-R-similar-to-MS-Excel-Solver-td4646759.html You might have some use for package limSolve and function lsei. Also see the CRAN Optimization Task View (http://cran.r-project.org/web/views/Optimization.html) Berend > Thanks for the attention. > I'm looking forward to hearing from you. > > Regards. > > Pina. > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/equation-solver-tp4647287.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. ______________________________________________ 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.
