Membina graf menggunakan gruff

class GruffController < ApplicationController

require 'rubygems'
require 'gruff'
require 'RMagick'

def Chart

g = Gruff::Line.new(500)
g.title = "Kenaikan Gaji Staff ABC Sdn. Bhd."
g.marker_font_size = 16
g.title_font_size = 20
count = 0

labelHash = {0 => '2002', 1 => '2003', 2 => '2004', 3 => '2005', 4 => '2006', 5 => '2007'}
g.labels = labelHash

colors = ['#F9181E', '#F95818', '#F6F918', '#1862F9', '#1EF918']

dataHash = Hash["En. A" => [40, 60, 50, 70, 65, 90],
"En. B" => [60, 75, 85, 78, 90, 95],
"En. C" => [30, 65, 34, 86, 50, 60],
"En. D" => [45, 54, 56, 55, 58, 60],
"En. E" => [56, 90, 45, 66, 60, 92]
]


for dataTitle in dataHash.keys
if colors && colors[count]
g.data(dataTitle, dataHash.fetch(dataTitle), colors[count])
else
g.data(dataTitle, dataHash.fetch(dataTitle))
end
count = count + 1
end

send_data(g.to_blob, :disposition => 'inline', :type => 'image/gif', :filename => "bart_scores.gif")
end

end