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N-dimensional table data structure for Ruby

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README.rdoc

NTable

NTable is an N-dimensional table data structure for Ruby.

Summary

NTable provides a convenient data structure for storing n-dimensional tabular data. It works with zero-dimensional scalar values, arrays, tables, and any arbitrary-dimensional hypertables. Each dimension is described by an axis object. The “rows” in that dimension might be identified by numbers or names. You can perform slice operations across any dimension, as well as reductions and dimensional decomposition. Finally, serialization is provided via a custom JSON schema, as well as a simple “hash of hashes” or “array of arrays” approach.

Dependencies

NTable is known to work with the following Ruby implementations:

  • Standard “MRI” Ruby 1.9.2 or later.

  • Rubinius 2.0 or later, in 1.9 mode.

  • JRuby 1.6 or later, in 1.9 mode.

Installation

Install NTable as a gem:

gem install ntable

Development and support

Documentation is available at dazuma.github.com/ntable/rdoc

Source code is hosted on Github at github.com/dazuma/ntable

Contributions are welcome. Fork the project on Github.

Build status:

Report bugs on Github issues at github.org/dazuma/ntable/issues

Contact the author at dazuma at gmail dot com.

Acknowledgments

NTable is written by Daniel Azuma (www.daniel-azuma.com).

Development is supported by Pirq (www.pirq.com).

Continuous integration service provided by Travis-CI (travis-ci.org).

License

Copyright 2012 Daniel Azuma

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  • Neither the name of the copyright holder, nor the names of any other contributors to this software, may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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