Matrix

Matrix is a linear algebra library for manipulating dense matrices. Its primary design goal is ease of use. It is desirable that the Matrix package interact with standard Elixir language constructs and other packages. The underlying storage mechanism is, therefore, Elixir lists.

A secondary design consideration is for the module to be reasonably efficient in terms of both memory usage and computations. Unfortunately there is a trade off between memory efficiency and computational efficiency. Where these requirements conflict Matrix will use the more computationally efficient algorithm.

Each matrix is represented as a "list of lists" whereby a 3x4 matrix is represented by a list of three items, with each item a list of 4 values. Constructors are provided for several common matrix configurations including zero filled, one filled, random filled the identity matrix, etc.

Installation

Add matrix as a dependency in your mix.exs file.

def deps do
  [ { :matrix, "~> 0.3.0" } ]
end

After you are done, run mix deps.get in your shell to fetch and compile Matrix. Start an interactive Elixir shell with iex -S mix and try the examples in the examples section.

Documentation

Documentation for the package is available online via Hex at http://hexdocs.pm/matrix. You can also generate local docs via the mix task

mix docs

This will generate the HTML documentation and place it into the doc subdirectory.

Examples

iex> Matrix.new(3, 4)
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]

iex> Matrix.ident(4)
[[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]

License

Copyright 2015 Thomas Krauss

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.