fpTrans {glmBfp} | R Documentation |
Simple function to apply the Box Tidwell transformation to a variables in a formula. Variable is first shifted and scaled NewVar = (Var+shift)/scale then transformed and optionally centered. Can be used in formulas as poly() is.
fpTrans(var, powers = 1, scale = 1, shift = 0, center = TRUE)
var |
the variable to transform |
powers |
one or more powers |
scale |
value to scale the variable after shifting (default=1) |
shift |
value to shift the variable by (default=0) |
center |
center the variable when tranforming. |
the transformed vector