On Tue, 25 Jan 2005 15:42:45 +0100, you wrote: |=[:o) Dear R users, |=[:o) |=[:o) Is it reasonable to transform data (measurements of plant height) to the |=[:o) power of 1/4? I�ve used boxcox(response~A*B) and lambda was close to 0.25. |=[:o)
IMHO (I'm far to be a statistician) no. I think that Box Cox procedure must be a help to people that had none experience in data transforming. In fact data transforming include other methods that Box Cox procedure can't perform as rank transformation, arcsine square root percent transformation, hyperbolic inverse sine, log-log, probit, normit and logit. Transformation is not simply an application of a formula to massive data. Is preferable decide appropriate transformation knowing deepening how and from where data were collected. |=[:o) Regards, |=[:o) Christoph |=[:o) |=[:o) ______________________________________________ |=[:o) [email protected] mailing list |=[:o) https://stat.ethz.ch/mailman/listinfo/r-help |=[:o) PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ------------------------------------------------------------------------------------------------------------------------- Landini dr. Massimiliano Tel. mob. (+39) 347 140 11 94 Tel./Fax. (+39) 051 762 196 e-mail: numero (dot) primo (at) tele2 (dot) it ------------------------------------------------------------------------------------------------------------------------- Legge di Hanggi: Pi� stupida � la tua ricerca, pi� verr� letta e approvata. Corollario alla Legge di Hanggi: Pi� importante � la tua ricerca, meno verr� capita. ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
