Hi Dimitris, Thank you so much! That really helps!
Shige On 8/17/05, Dimitris Rizopoulos <[EMAIL PROTECTED]> wrote: > I don't know what specific application Rick has in mind, but if there > is possibility of missing values (which is common, e.g., in > longitudinal studies) then this should also be taken into account in > the power calculations. > > Best, > Dimitris > > ---- > Dimitris Rizopoulos > Ph.D. Student > Biostatistical Centre > School of Public Health > Catholic University of Leuven > > Address: Kapucijnenvoer 35, Leuven, Belgium > Tel: +32/16/336899 > Fax: +32/16/337015 > Web: http://www.med.kuleuven.be/biostat/ > http://www.student.kuleuven.be/~m0390867/dimitris.htm > > > ----- Original Message ----- > From: "Henric Nilsson" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Cc: <[email protected]> > Sent: Wednesday, August 17, 2005 10:42 AM > Subject: Re: [R] Mixed Effects Model Power Calculations > > > > > > On Ti, 2005-08-16, 21:17, [EMAIL PROTECTED] skrev: > > > >> Is there an R package available that would facilitate doing a > >> power/sample > >> size analysis for linear mixed effects models? > > > > I'm not aware of such a package (others might be...). > > > > When it comes to sample size calculations, especially for tricky > > designs > > and/or advanced methodology, simulation is usually the best > > approach. An > > example using `lme' can be found at > > > > http://maven.smith.edu/~nhorton/R/ > > > > > > HTH, > > Henric > > > >> I have seen the Java applets made available by Russell Length which > >> would > >> seem to be able to handle most any lme, but there is little > >> documentation > >> and it's not clear how the models need to be formulated. > >> > >> Rick B. > >> > >> ______________________________________________ > >> [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 > > > > ______________________________________________ > > [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 > > > > ______________________________________________ > [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 > ______________________________________________ [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
