Gvizで二分木データ構造の図を作成する

gvizをインストール

$ gem install gviz

ソースコード

graph.rb

# coding: utf-8

require 'gviz'

gv = Gviz.new

gv.add %i(two three) => :one
gv.add %i(five six) => :two
gv.add %i(seven eight) => :three
gv.add %i(nine ten) => :five
gv.add %i(eleven twelve) => :six
gv.add %i(thirteen fourteen) => :seven
gv.add %i(fifteen sixteen) => :eight

gv.save :sample, :png

出力結果