require 'daru/view'

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

bar_graph1 = Daru::View::Plot.new(dv, type: :bar)

bar_graph1.init_script

Daru::View.plotting_library = :nyaplot

bar_graph1.div

IRuby.html bar_graph1.div

bar_graph1.show_in_iruby