This post originated from an RSS feed registered with Ruby Buzz by Matt Williams. Original Post: Ruport Graphs Feed Title: Ruby Blender Feed URL: http://feeds2.feedburner.com/RubyBlender Feed Description: This blog contains short-ish ruby tips, hints, and techniques. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Matt Williams Latest Posts From Ruby Blender

ruport comes with an extension, ruport-util which adds, among other things, the ability to create graphs from reports. However, it's hardcoded to do line graphs. This is a code snippet which will (for png and jpg graphs, the others should follow) allow you to create other types -- it's just bar graphs, but the others would follow....

  
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require 'ruport'
require 'ruport/util'
require 'entry'

class Ruport::Formatter
  module Graph

    class Gruff < Ruport::Formatter

      def build_graph
        height = "#{options.width || 600}"
        width = "#{options.height || 800}"
        dimensions = "#{width}x#{height}"
        type = options.graph_type || :line

        graph = case type
          when :line
           ::Gruff::Line.new(dimensions)
          when :bar
           ::Gruff::Bar.new(dimensions)
        end
                graph.title = options.title if options.title
        graph.labels = options.labels if options.labels
        data.each do |r|
          graph.data(r.gid,r.to_a)
        end

        graph.maximum_value = options.max if options.max
        graph.minimum_value = options.min if options.min

        output << graph.to_blob(format.to_s)

      end

    end
  end
end

As I said, it's nothing special, but might be of some utility.