This helper function applies a chosen scaling or transformation to specified numeric columns in a data frame. Supported built‑in transformations include no transformation ("none"), log2, log10, and z‑score scaling. A custom function can also be supplied to perform arbitrary transformations.
Usage
apply_scale(
data,
columns = NULL,
scale = c("none", "log2", "log10", "zscore", "custom"),
custom_fn = NULL
)Arguments
- data
A data.frame or matrix containing the data to be transformed.
- columns
A character vector of column names to transform. If NULL (default) all numeric columns will be transformed.
- scale
A character string specifying the transformation to apply. Possible values are "none", "log2", "log10", "zscore", or "custom". When set to "custom" the function specified in
custom_fnwill be applied to the columns.- custom_fn
A function that takes a numeric vector and returns a transformed numeric vector. Only used when
scale = "custom".