[R] How to estimate Variance Components

Prof Brian Ripley
Sun, 10 Oct 2004 10:00:25 -0000

On Sun, 10 Oct 2004 WeiQiang.Li at seagate.com wrote:

>         I want to know how to calculate estimated Variance Components for
> unbalance ANOVA. Can anybody please provide me the formula? Thanks in
> advance!

Please read the posting guide: this is not an R question.

It has no simple answer, as there is no `the formula'.  There are a number
of different methods based on different principles, most of which are
iterative.

If your email address (you give no signature) accurately reflects your
position, I think the best answer is `consult your employer's statistical
consultants'.

--
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595