Transform data using ArcSinh transformation

Function to transform data in selected columns using ArcSinh transformation with a specified co-factor.

Usage

do.asinh(dat, use.cols, cofactor=5, append.cf=FALSE,
reduce.noise=FALSE)

dat: NO DEFAULT. data.table object. Input data.
use.cols: NO DEFAULT. Vector of character column names. The columns to transform. These columns will be transformed and added to the data.table as new columns.
cofactor: DEFAULT = 5. Co-factor to use for arcsinh transformation. Can be list of co-factors that matches the columns in use.cols. If specifying a list of co-factors make sure each column in use.cols is assigned a co-factor (repeat values if necessary).
append.cf: DEFAULT = FALSE. Appends the co-factor used to the end of the name of the transformed columns.
reduce.noise: DEFAULT = FALSE. This is an experimental calculation which should reduce noise from negative values. Use with caution.

A data.table with new columns added, that contain asinh transformed data.