loglik(x,...)
"boxcox"
, typically the output
from performing a Box-Cox transformation analysis with
boxcox
.
The log-likelihoods of different lambda values from a Box-Cox transformation analysis are plotted, showing which value of lambda maximizes the log-likelihood. A 95% confidence interval for the optional lambda is also plotted.
Box, G.E.P (1988) Signal-to-noise ratios, performance
criteria, and transformations. Technometrics, 30:1-17.
Box, G.E.P. and D.R. Cox (1964) An analysis of
transformations
(with discussion). J. Royal Statist. Soc. Ser. B, 26:211-246
Box, G.E.P. and C.A. Fung (1983) Some considerations
in estimating data transformations. MRC Report #2609,
University of Wisconsin-Madison.
Box, G.E.P. and C.A. Fung (1986) Studies in quality
improvement: Minimizing transmitted variation by
parameter design. Report 8, University of
Wisconsin-Madison, Center for Quality and Productivity
Improvement (submitted to the Journal of Quality
Technology).
Box, G. E. P., W. G. Hunter, and J. S. Hunter
(1978) Statistics for Experimenters,
New York: Wiley.
Haaland, P. D. (1989)
Experimental Design in Biotechnology,
New York: Marcel Dekker.
buffer.fac <- fac.aov(buffer.df) buffer.bc <- boxcox(buffer.fac, ~pH*thimer + pH*gent) loglik(buffer.bc)