No Scaling This function defines a preprocessing strategy that is applied via prep_X.

No Scaling This function defines a preprocessing strategy that is applied via prep_X.

Usage

unscaled(center = FALSE)

Arguments

center

Logical. If TRUE, variables are mean-centered before scaling.

Value

A list with elements:

X

Numeric matrix containing the scaled data.

prep

List describing the preprocessing, including centering and scaling parameters (center, scale, X_mean, X_sd).

#' @details Leaves variables unscaled. Optional centering.

See also

Other scaling_strategies: pareto_scaling(), uv_scaling()

Examples

just_centering <- unscaled(center=TRUE)
X <- matrix(c(10,10, 0,0, 0, 10), ncol=3)
X_centered <- prep_X(just_centering, X)
str(X_centered)
#> List of 2
#>  $ X   : num [1:2, 1:3] 0 0 0 0 -5 5
#>  $ prep:List of 4
#>   ..$ center: logi TRUE
#>   ..$ scale : chr "None"
#>   ..$ X_mean: num [1:3] 10 0 5
#>   ..$ X_sd  : num [1:3] 0 0 7.07
X_centered$X
#>      [,1] [,2] [,3]
#> [1,]    0    0   -5
#> [2,]    0    0    5