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trafo  

Estimation, Comparison and Selection of Transformations
View on CRAN: Click here


Download and install trafo package within the R console
Install from CRAN:
install.packages("trafo")

Install from Github:
library("remotes")
install_github("cran/trafo")

Install by package version:
library("remotes")
install_version("trafo", "1.0.1")



Attach the package and use:
library("trafo")
Maintained by
Ann-Kristin Kreutzmann
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2018-07-30
Latest Update: 2018-11-27
Description:
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.
How to cite:
Ann-Kristin Kreutzmann (2018). trafo: Estimation, Comparison and Selection of Transformations. R package version 1.0.1, https://cran.r-project.org/web/packages/trafo. Accessed 06 Aug. 2026.
Previous versions and publish date:
(2026-07-09 07:14), 1.0.0 (2018-07-30 12:50), 1.0.1 (2018-11-27 17:30)
Other packages that cited trafo R package
View trafo citation profile
Other R packages that trafo depends, imports, suggests or enhances
Complete documentation for trafo
Functions, R codes and Examples using the trafo R package
Some associated functions: ML . as.data.frame.trafo . assumptions . bickeldoksum . boxcox . boxcoxshift . diagnostics . diagnostics.trafo_compare . diagnostics.trafo_lm . diagnostics_internal . divergence_min_CvM . divergence_min_KL . divergence_min_KS . dual . est_lm . est_lme . estim_lm . estim_lme . get_modelt . get_transformed . glog . gpower . kurtosis_min . logshift . logshiftopt . logtrafo . manly . modulus . neglog . oneparam.lm . oneparam . plot.trafo_compare . plot.trafo_lm . plot_trafolm . print.diagnostics.trafo_compare . print.diagnostics.trafo_lm . print.summary.trafo_compare . print.summary.trafo_lm . print.trafo . print.trafo_compare . print.trafo_lm . reciprocal . skewness_min . sqrtshift . summary.trafo_compare . summary.trafo_lm . trafo . trafo_compare . trafo_lm . woparam.lm . woparam . yeojohnson . 
Some associated R codes: Glog.R . assumptions.R . back_transformed.R . bickeldocksum.R . boxcox.R . boxcoxshift.R . check_assumptions.R . check_compare_trafo.R . check_negy.R . check_oneparam.R . check_trafo_predict.R . check_trafomod.R . check_woparam.R . compare_trafo.R . diagnostics.R . diagnostics.compare_trafo.R . diagnostics.trafo_mod.R . diagnostics_internal.R . dual.R . estim.R . estims.R . get_modelt.R . get_transformed.R . gpower.R . log.R . logshift.R . logshiftopt.R . manly.R . modulus.R . neglog.R . oneparam.R . oneparam.lm.R . plot.compare_trafo.R . plot.trafo_mod.R . plotit.R . print.compare_trafo.R . print.trafo.R . print.trafo_mod.R . reciprocal.R . sqrtshift.R . summary.compare_trafo.R . summary.trafo_mod.R . summary_internal.R . trafo.R . trafoEst.R . trafo_lm.R . trafos.R . woparam.R . woparam.lm.R . yeojohnson.R .  Full trafo package functions and examples
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