google chart api のサンプル

- http://gchartrb.rubyforge.org/
> gchartrb is a Ruby wrapper around the Google Chart API, located at code.google.com/apis/chart/
というものがあるのを知った。

これは http://code.google.com/intl/ja/apis/chart/ を ruby から使うための wrapper だ。

rdoc 中のサンプルコードをまとめて走らせてみた。
出力結果は、各グラフ生成要求の url だ。

$ cat sample00.rb
# See http://gchartrb.rubyforge.org/

require 'rubygems'
require 'google_chart'

# ---------------------
bc = GoogleChart::BarChart.new('800x200', "Bar Chart", :vertical, false)
bc.data "Trend 1", [5,4,3,1,3,5], '0000ff'

# Fill Area (Multiple Datasets)
lc = GoogleChart::LineChart.new('320x200', "Line Chart", false) do |lc|
lc.show_legend = false
lc.data "Trend 1", [5,5,6,5,5], 'ff0000'
lc.data "Trend 2", [3,3,4,3,3], '00ff00'
lc.data "Trend 3", [1,1,2,1,1], '0000ff'
lc.data "Trend 4", [0,0,0,0,0], 'ffffff'
lc.fill_area '0000ff',2,3
lc.fill_area '00ff00',1,2
lc.fill_area 'ff0000',0,1
end
puts lc.to_url
puts

# Fill Area (Single Dataset)
lc = GoogleChart::LineChart.new('320x200', "Line Chart", false) do |lc|
lc.show_legend = false
lc.data "Trend 1", [5,5,6,5,5], 'ff0000'
lc.fill_area 'cc6633', 0, 0
end
puts lc.to_url
puts

# ---------------------
flc = GoogleChart::FinancialLineChart.new do |chart|
chart.data "", [3,10,20,37,40,25,68,75,89,99], "ff0000"
end
puts flc.to_url
puts

# ---------------------
# Line Chart
lc = GoogleChart::LineChart.new('320x200', "Line Chart", false)
lc.data "Trend 1", [5,4,3,1,3,5,6], '0000ff'
lc.data "Trend 2", [1,2,3,4,5,6], '00ff00'
lc.data "Trend 3", [6,5,4,3,2,1], 'ff0000'
lc.axis :y, :range => [0,6], :color => 'ff00ff', :font_size => 16, :alignment => :center
lc.axis :x, :range => [0,6], :color => '00ffff', :font_size => 16, :alignment => :center

# Line XY Chart
lcxy = GoogleChart::LineChart.new('320x200', "Line XY Chart", true)
lcxy.data "Trend 1", [[1,1], [2,2], [3,3], [4,4]], '0000ff'
lcxy.data "Trend 2", [[4,5], [2,2], [1,1], [3,4]], '00ff00'
puts lcxy.to_url
puts

# ---------------------
pc = GoogleChart::PieChart.new("600x300", "Food and Drinks Consumed Christmas 2007")
pc.data "Egg nog", 10, '00AF33'
pc.data "Christmas Ham", 20, '4BB74C'
pc.data "Milk (not including egg nog)", 8, 'EE2C2C'
pc.data "Cookies", 25, 'CC3232'
pc.data "Roasted Chestnuts", 5, '33FF33'
pc.data "Chocolate", 3, '66FF66'
pc.data "Various Other Beverages", 15, '9AFF9A'
pc.data "Various Other Foods", 9, 'C1FFC1'
pc.data "Snacks", 5, 'CCFFCC'
puts pc.to_url
puts

# ---------------------
sc = GoogleChart::ScatterChart.new('320x200',"Scatter Chart")
sc.data "Scatter Set", [[1,1,], [2,2], [3,3], [4,4]]
sc.point_sizes [10,15,30,55]
puts sc.to_url
puts

# ---------------------
vd = GoogleChart::VennDiagram.new("320x200", 'Venn Diagram')
vd.data "Blue", 100, '0000ff'
vd.data "Green", 80, '00ff00'
vd.data "Red", 60, 'ff0000'
vd.intersections 30,30,30,10
puts vd.to_url
puts

ruby でも、jruby でも動作する。ここでは jruby で走らせてみた。
$ jruby sample00.rb
http://chart.apis.google.com/chart?chs=320x200&cht=lc&chco=ff0000,00ff00,0000ff,ffffff&chd=s:yy9yy,eeoee,KKUKK,AAAAA&chm=b,0000ff,2,3,0|b,00ff00,1,2,0|b,ff0000,0,1,0&chtt=Line+Chart

http://chart.apis.google.com/chart?chs=320x200&cht=lc&chco=ff0000&chd=s:yy9yy&chm=B,cc6633,0,0,0&chtt=Line+Chart

http://chart.apis.google.com/chart?chs=100x15&cht=lfi&chco=ff0000&chd=s:BGMWYPpu29

http://chart.apis.google.com/chart?chs=320x200&cht=lxy&chco=0000ff,00ff00&chd=s:Pet9,MYkw,9ePt,9YMw&chdl=Trend+1|Trend+2&chtt=Line+XY+Chart

http://chart.apis.google.com/chart?chs=600x300&cht=p&chco=00af33,4bb74c,ee2c2c,cc3232,33ff33,66ff66,9aff9a,c1ffc1,ccffcc&chd=s:YwT9MHkVM&chl=Egg+nog|Christmas+Ham|Milk+(not+including+egg+nog)|Cookies|Roasted+Chestnuts|Chocolate|Various+Other+Beverages|Various+Other+Foods|Snacks&chtt=Food+and+Drinks+Consumed+Christmas+2007

http://chart.apis.google.com/chart?chs=320x200&cht=s&chd=s:Pet9,Pet9,LQh9&chtt=Scatter+Chart

http://chart.apis.google.com/chart?chs=320x200&cht=v&chco=0000ff,00ff00,ff0000&chd=s:9wkSSSG&chdl=Blue|Green|Red&chtt=Venn+Diagram

この blog に引用した 出力 URL には hyperlink を張っておいた。
クリックすると生成されたグラフが瞬時に表示される。

最後のベン図のイメージだけはスクリンショットを示そう。

出力形式をSVG にしたような類似サービス or API が xfy にもあるとよいと思う。