Box Cox

This section of variable menu aids the user to perform 4 different functions on variables of a given dataset, i.e; box cox transformation inspect lambda, add/remove lambda, reverse box cox.

Box-Cox Transformation of data of non-normal data to normal

It is a function used to transform non-normal variable to normal with MASS::boxcox Box-Cox transformation cannot be performed on negative values

Inspect Lambda

Checks for the associated Lambda (λ) value, if any, for the selected variables with prior Box-Cox transformation

Add/Remove Lambda

This dialog is provided for convenience if the Lambda (λ) associated with the variable needs to be recorded correctly or adjusted. The correct Lambda (λ) value is important as it will be used if inverse Box-Cox is needed

Inverse Box-Cox

Transform back (inverse) from a prior Box-Cox transformed value using the specified lambda or the lambda associated with the variable selected