Boxcox In R. If plotit TRUE plots log-likelihood vs lambda and indicates a 95 confidence interval about the maximum observed value of lambdaIf interp TRUE spline interpolation is used to give a smoother plot. The starting value for the optimization is always lambda1 ie no transformation.
Maximization log and nolog specify whether to display the iteration log. In the case when optimizeTRUE the function boxcox calls the R function nlminb to minimize the negative value of the objective ie maximize the objective over the range of possible values of lambda specified in the argument lambda. Last updated over 3 years ago.
This work gives a clearwarning about the nave implementation of a transformation to the linear mixed model wheninterest lies in the variance components andor the random effects.
Maximization log and nolog specify whether to display the iteration log. Begingroup I have had a look at the links but neither give refer to specific R code which I can use. It uses a log-likelihood procedure to find the lambda to use to transform the dependent variable for a linear model such as an ANOVA or linear regression. See set iterlog inR set iter.
