require 'daru'

dv = Daru::Vector.new [:a, 1, :a, 1, :c], type: :category

dv.frequencies

dv = Daru::Vector.new [:a, 1, :a, 1, :c], type: :category, categories: [:a, :b, :c, 1]

dv.frequencies

dv = Daru::Vector.new [:a, 1, :a, 1, :c], categories: [:a, :b, :c, 1], ordered: false, type: :category

dv.min

dv = Daru::Vector.new [:a, 1, :a, 1, :c], ordered: true, categories: [:a, :b, :c, 1], type: :category

dv.min

dv.sort!

dv = Daru::Vector.new [:a, 1, :c, 1, :c], type: :category
dv.categories = [:a, :b, :c, 1]

dv.categories

dv = Daru::Vector.new [:a, 1, :c, 1, :c], type: :category
dv.ordered?

dv.ordered = true
dv.ordered?

dv = Daru::Vector.new [:a, :a, :a, :b, :b, :c], type: :category
dv.summary

dv = Daru::Vector.new ['third']*3 + ['second']*2 + ['first'], type: :category, categories: ['first', 'second', 'third']
dv.frequencies

dv

dv.min

dv.ordered = true

dv.min

dv.max

dv.sort!

dv


dv[0] = 'fourth'

dv.add_category 'fourth'
dv[0] = 'fourth'
dv

dv.categories

dv = Daru::Vector.new [1, 2, 'third', 2, 1], type: :category

dv.rename_categories 1 => 'first', 2 => 'second'
dv

dv = Daru::Vector.new [1, 1, 2, 2, 3, 1], index: :a..:f, type: :category

dv[0..2]

dv.at -1

dv.set_at [0, 1], 3
dv

dv = Daru::Vector.new ['I', 'II', 'I', 'III', 'IV', 'I', 'II'], type: :category, categories: ['I', 'II', 'III', 'IV']
dv.ordered = true
dv.frequencies

dv.where(dv.eq('I'))

dv.where(dv.gt('II'))

df = Daru::DataFrame.new({
  a: (1..7).to_a,
  b: ('a'..'g').to_a,
  c: ['I', 'II', 'I', 'III', 'IV', 'I', 'II']
  })

df.c = df.c.to_category
df

df.where(df.c.gt('I') & df.c.lt('IV'))

dv = Daru::Vector.new ['I', 'II', 'I', 'III', 'IV', 'I', 'II'], type: :category, categories: ['I', 'II', 'III', 'IV']
dv.name = 'Rank'
dv.contrast_code

dv.base_category = 'IV'
dv.contrast_code

dv.coding_scheme = :deviation
dv.contrast_code