new_transformation | R Documentation |
Produces a new transformation for fable modelling functions which will be used to transform, back-transform, and adjust forecasts.
new_transformation(transformation, inverse)
invert_transformation(x, ...)
transformation |
A function which transforms the data |
inverse |
A function which is the inverse of a transformation |
x |
A transformation (such as one created with |
... |
Further arguments passed to other methods. |
For more details about transformations, read the vignette:
vignette("transformations", package = "fable")
scaled_logit <- function(x, lower=0, upper=1){
log((x-lower)/(upper-x))
}
inv_scaled_logit <- function(x, lower=0, upper=1){
(upper-lower)*exp(x)/(1+exp(x)) + lower
}
my_scaled_logit <- new_transformation(scaled_logit, inv_scaled_logit)
t_vals <- my_scaled_logit(1:10, 0, 100)
t_vals
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