Create a class (one-hot) matrix from a categorical vector

Source: R/nmfkc.R

nmfkc.class converts a categorical or factor vector into a class matrix (one-hot encoded representation), where each row corresponds to a category and each column corresponds to an observation.

nmfkc.class(x)

Arguments

x

A categorical vector or a factor.

Value

A binary matrix with one row per unique category and one column per observation. Each column has exactly one entry equal to 1, indicating the category of the observation.

See also

nmfkc

Examples

# install.packages("remotes")
# remotes::install_github("ksatohds/nmfkc")
# Example.
Y <- nmfkc.class(iris$Species)
Y[,1:6]
#>            1 2 3 4 5 6
#> setosa     1 1 1 1 1 1
#> versicolor 0 0 0 0 0 0
#> virginica  0 0 0 0 0 0