On Wed, 2005-11-02 at 13:10 +0100, Illyes Eszter wrote: > Dear Colleagues, > > It is Eszter Illyés from Hungary. I just have started to use R yesterday, > so I am a real beginner (but I could run some PCOA and managed to > transpose a dataframe). > > No I have a problem that I would like to standardize my datafile with > the row totals and than make an arcsin squareroot transformation. > How can I do that? In which package shall I look for and for what > option?
For standardising by row total look at decostand() with method = "total" in package vegan. (360 / (2 * pi)) * asin(sqrt(x)) where x is vector of data-points will apply that transformation. If you want to apply it to all columns in your dataframe then look at ?sapply and modify the above accordingly. HTH G > Thank you very much, have a nice day > > Eszter > > _______________________________________________________________________ > Képtipp! Játssz a T-Online képkeresőjével! Ha elég ügyes és gyors vagy, > felkerülhetsz a dicsőségtáblára... www.t-online.hu > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Gavin Simpson [T] +44 (0)20 7679 5522 ENSIS Research Fellow [F] +44 (0)20 7679 7565 ENSIS Ltd. & ECRC [E] gavin.simpsonATNOSPAMucl.ac.uk UCL Department of Geography [W] http://www.ucl.ac.uk/~ucfagls/cv/ 26 Bedford Way [W] http://www.ucl.ac.uk/~ucfagls/ London. WC1H 0AP. %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
