you can still use scale() (as you have been told), look at the help page for more info, especially at the Arguments section, e.g.,
mat <- matrix(rnorm(100*10), 100, 10) rng <- apply(mat, 2, range) scale(mat, scale = rng[2, ] - rng[1, ]) or you could even use apply() directly, e.g., apply(mat, 2, function(x) (x - mean(x)) / diff(range(x)) ) I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Sergio Della Franca" <[EMAIL PROTECTED]> To: <r-help@stat.math.ethz.ch> Sent: Wednesday, March 28, 2007 11:00 AM Subject: [R] Standardization Range > Dear R-Helpers, > > > I want to perform a standardization of a variable with range method. > > i.e.: > > Standardization (range) ==> (var-min(var))/(max(var)-min(var)) > > > Do you konw how can i develop this? > > Thank you in advance. > > > Sergio Della Franca > > [[alternative HTML version deleted]] > > ______________________________________________ > 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 > and provide commented, minimal, self-contained, reproducible code. > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.