Denormalize a matrix from \([0,1]\) back to its original scale

nmfkc.denormalize rescales a matrix with values in \([0,1]\) back to its original scale using the column-wise minima and maxima of a reference matrix.

Usage

nmfkc.denormalize(x, ref = x)

Arguments

x

A numeric matrix (or vector) with values in \([0,1]\) to be denormalized.

ref

A reference matrix used to obtain the original column-wise minima and maxima. Must have the same number of columns as x.

Value

A numeric matrix with values transformed back to the original scale.

See also

nmfkc.normalize

Examples

x <- nmfkc.normalize(iris[, -5])
x_recovered <- nmfkc.denormalize(x, iris[, -5])
apply(x_recovered - iris[, -5], 2, max)
#> Sepal.Length  Sepal.Width Petal.Length  Petal.Width 
#> 0.000000e+00 4.440892e-16 0.000000e+00 2.220446e-16