daru

https://github.com/sciruby/daru

Ruby

Data Analysis in RUby

Daru::DataFrame#which

a simple query DSL for accessing where(), inspired by gem "squeel"
e.g.:
df.which{ `FamilySize` == `FamilySize`.max }
equals
df.where( df['FamilySize'].eq( df['FamilySize'].max ) )

e.g.:
df.which{ (`NameTitle` == 'Dr') & (`Sex` == 'female') }
equals
df.where( df['NameTitle'].eq('Dr') & df['Sex'].eq('female') )

Source | Google | Stack overflow

Edit

git clone [email protected]:sciruby/daru.git

cd daru

open lib/daru/extensions/which_dsl.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Daru--DataFrame-which-for-pr

# Commit to git

git add lib/daru/extensions/which_dsl.rbgit commit -m "better docs for Daru::DataFrame#which"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Daru--DataFrame-which-for-pr

hub pull-request

# Celebrate!