SVG::Graph

Description

This repo is the continuation of the original SVG::Graph library by Sean Russell. I'd like to thank Claudio Bustos for giving me permissions to continue publishing the gem under it's original name: svg-graph

Changelog

I'm maintaing in my free time, so I can't promise on any deadlines. Please notify me (via github messages or on the Issues section) if you find any bug.

Contribute

Pull requests are very welcome :-)

Usage

For a complete list of configuration options please have a look at the source - most important Graph.rb, also checkout the subclasses (Pie, Bar, etc.) as they might provide additional options.

You can require everything at once

require 'svggraph'

or only the individual parts you need

require 'SVG/Graph/Bar'
require 'SVG/Graph/Line'
...

In the following some examples to get you up to speed.

Bar

require 'SVG/Graph/Bar'

x_axis = ['1-10', '10-30', '30-50', '50-70', 'older']

options = {
  :width             => 640,
  :height            => 300,
  :stack             => :side,  # the stack option is valid for Bar graphs only
  :fields            => x_axis,
  :graph_title       => "kg per head and year chocolate consumption",
  :show_graph_title  => true,
  :show_x_title      => true,
  :x_title           => 'Age in years',
  :show_y_title      => true,
  :y_title           => 'kg/year',
  :y_title_location  => :end,
  :no_css            => true
}

male_data   = [2, 4, 6, 4, 2]
female_data = [1, 5, 4, 5, 2.7]

g = SVG::Graph::Bar.new(options)

g.add_data( {
    :data => female_data,
    :title => "Female"
  })
g.add_data( {
    :data => male_data,
    :title => "Male"
  })

# graph.burn            # this returns a full valid xml document containing the graph
# graph.burn_svg_only   # this only returns the <svg>...</svg> node
File.open('bar.svg', 'w') {|f| f.write(g.burn_svg_only)}