Notebook on nbviewer (original) (raw)

df = Daru::DataFrame.new({ x: [1, 2, 3, 4, 5, 6, 7, 8], y: [3, 2, 3, 5, 6, 1, 2, 3], cat: ['III', 'II', 'I', 'I', 'II', 'I', 'III', 'III'] }) df[:cat] = df[:cat].to_category categories: ['I', 'II', 'III'] df[:cat].type