-*- rdoc -*-

= MathViz

* http://github.com/JustinLove/mathviz

== DESCRIPTION:

Turn simple equations (a = b * c) into GraphViz dot files showing relationships, values, and units.

== FEATURES/PROBLEMS:

* Adds one method to Object (by way of Graphable) and several to Numeric (by way Measurable, Unit, and NumericExtensions)  If you use units of measure, each unit will appear on Numeric via module Unit.
* MathViz produces textual .dot files.  You will need a viewer which supports dot files directly, or Graphviz to convert them to images yourself.

== SYNOPSIS:

  require 'mathviz'
  
  # No units are provided by default.
  # You can also use 1.unit(:m).per.unit(:s) etc.
  module MathViz::Units
    new_units :m, :s, :kg, :lb, :joule
  end
  
  MathViz.new {
    # Alternate form: MathViz.new('optional_output_filename', binding_object)
  
    m = 140.lb * 0.45359237.kg.per.lb
    c = 299_792_458.m.per.s
    # capitalized values are constants in ruby, so we need the underscore
    _E = (m * (c * c)) * 1.joule.per.kg.m.m.per.s.s
  
    binding # Don't forget to return the binding
  }.dot # Required to produces the actual .dot file

link:examples/E_mc2.png
== REQUIREMENTS:

* GraphvizR (aka graphviz_r)
* Graphviz - http://www.graphviz.org/

== INSTALL:

* sudo gem install mathviz

== LICENSE:

Creative Commons Attribution-Share Alike 3.0 Unported Licence
http://creativecommons.org/licenses/by-sa/3.0/


mathviz

Justin Love

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mathviz

No units are provided by default.

You can also use 1.unit(:m).per.unit(:s) etc.

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