elasticsearch-ruby

https://github.com/elastic/elasticsearch-ruby

Ruby

Ruby integrations for Elasticsearch

Matrix#lup

Returns the LUP decomposition of the matrix; see +LUPDecomposition+.
  a = Matrix[[1, 2], [3, 4]]
  l, u, p = a.lup
  l.lower_triangular? # => true
  u.upper_triangular? # => true
  p.permutation?      # => true
  l * u == p * a      # => true
  a.lup.solve([2, 5]) # => Vector[(1/1), (1/2)]

Source | Google | Stack overflow

Edit

git clone [email protected]:elastic/elasticsearch-ruby.git

cd elasticsearch-ruby

open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Matrix-lup-for-pr

# Commit to git

git add git commit -m "better docs for Matrix#lup"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Matrix-lup-for-pr

hub pull-request

# Celebrate!