Bar chart with Gruff and most of options used.rb

#!/usr/bin/ruby

require 'rubygems'
require 'gruff'

# Let's hack almost everything
g = Gruff::Bar.new('800x700') # Define a custom size

g.sort = false  # Do NOT sort data based on values
g.maximum_value = 40  # Declare a max value for the Y axis
g.minimum_value = 0   # Declare a min value for the Y axis
g.y_axis_increment = 1  # Points shown on the Y axis

g.legend_font_size = 14 # Legend font size
g.title_font_size = 22 # Title font size

g.font = '/Library/Fonts/NuevaStd-BoldCond.otf' # Path to a custom font

g.top_margin = 10 # Empty space on the upper part of the chart
g.bottom_margin = 30  # Empty space on the lower part of the chart

g.theme = {   # Declare a custom theme
  :colors => %w(orange purple green white red #cccccc), # colors can be described on hex values (#0f0f0f)
  :marker_color => 'black', # The horizontal lines color
  :background_colors => %w(white grey) # you can use instead: :background_image => ‘some_image.png’
}

g.title = 'A more advanced bar chart'
g.x_axis_label = "X axis label"
g.y_axis_label = "Y axis label"

g.data('Foo', [5, 10, 24])
g.data('Bar', [15, 3, 10])
g.data('Else', [38, 15, 32])

g.labels = {0 => 'Last year', 1 => 'This year', 2 => 'Next year'} # Define labels for each of the "columns" in data

g.write('advanced_graph.png')

thank you