ruby_maxima

RubyMaxima

Use Maxima (a computer algebra system) from Ruby.

Installation

Add this line to your application's Gemfile:

gem 'ruby_maxima'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby_maxima

Usage

RubyMaxima has a single class to work with: the Session. It practically translates all methods into Maxima calls, except for:

• execute - This executes all the commands in the session.
• commands - Here you can have a look at the current commands in the session.
• debug= - Here you can set the debug mode. When it is set to true, RubyMaxima will print the output from maxima.

RubyMaxima will automatically translate hashes: constraints: 'x+y<=100' becomes constraints = x+y<=100. Here is an example:

  s = RubyMaxima::Session.new
  s.load 'fmin_cobyla'
  s.fmin_cobyla '-(x*y)',['x', 'y'], [1,1], constraints: ['x*y<=49']
  eval s.execute # handle this line with absolute care!

Todos

Feel free to open issues for missing features.

• I did not implement the basic arithmetic operations, since I don't need them.
• Implement an assigns method on session which takes a variable name and a block and assigns the result of the block to the variable in maxima.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/phikes/ruby_maxima.