gistfile1.rb

def distribution_chart_helper(width,height,sent,click, hist_sent, hist_click)
  max_val = [sent,click, 1].max
  hist_max_val = [hist_sent, hist_click, 1].max
  
  hist_sent = max_val.to_f * hist_sent / hist_max_val.to_f
  hist_click = max_val.to_f * hist_click / hist_max_val.to_f
  
  data = [sent,click, hist_sent, hist_click].map{|d| [d,0.01].max}.join("|")
  legend = "sent|clicks"
  data_labels = (0..1).map{|i|  "N*f0*,000000,#{i},-1,11"}.join("|")
  
  series_colors = %Q{76a4fb,405887,76a4fb,405887}
  url = %Q{http://chart.apis.google.com/chart?chxt=y,r&chbh=a&chs=#{width}x#{height}&cht=bvg&chf=bg,s,efefef}
  url += %Q{&chds=0,#{max_val*1.1}&chxr=0,0,#{max_val}|1,0,#{hist_max_val}}
  url += %Q{&chco=#{series_colors}}
  url += %Q{&chd=t:#{data}&&chdl=#{legend}}
  url += %Q{&chm=#{data_labels}}
  url
end