trafo - Estimation, Comparison and Selection of Transformations
Estimation, selection and comparison of several families
of transformations. The families of transformations included in
the package are the following: Bickel-Doksum (Bickel and Doksum
1981 <doi:10.2307/2287831>), Box-Cox, Dual (Yang 2006
<doi:10.1016/j.econlet.2006.01.011>), Glog (Durbin et al. 2002
<doi:10.1093/bioinformatics/18.suppl_1.S105>), gpower
(Kelmansky et al. 2013 <doi:10.1515/sagmb-2012-0030>), Log,
Log-shift opt (Feng et al. 2016 <doi:10.1002/sta4.104>), Manly,
modulus (John and Draper 1980 <doi:10.2307/2986305>), Neglog
(Whittaker et al. 2005 <doi:10.1111/j.1467-9876.2005.00520.x>),
Reciprocal and Yeo-Johnson. The package simplifies to compare
linear models with untransformed and transformed dependent
variable as well as linear models where the dependent variable
is transformed with different transformations. Furthermore, the
package employs maximum likelihood approaches, moments
optimization and divergence minimization to estimate the
optimal transformation parameter.