Create a dummy matrix from the elements in a factor

Create a dummy matrix based on the elements of a factor. Each column in the produced matrix is a dummy indicator.

factor_to_dummy(afactor)

Arguments

afactor

a factor (preferably of vectors)

Value

A matrix of dummy variables

Author

Gaston Sanchez

Examples

# let's say you have a list like this
some_factor = iris$Species[c(1:3,51:53,101:103)]

# get dummy matrix
factor_to_dummy(some_factor)
#>   setosa versicolor virginica
#> 1      1          0         0
#> 2      1          0         0
#> 3      1          0         0
#> 4      0          1         0
#> 5      0          1         0
#> 6      0          1         0
#> 7      0          0         1
#> 8      0          0         1
#> 9      0          0         1