daru

https://github.com/sciruby/daru

Ruby

Data Analysis in RUby

Daru::Vector#lag

Lags the series by `k` periods.

Lags the series by `k` periods, "shifting" data and inserting `nil`s
from beginning or end of a vector, while preserving original vector's
size.

`k` can be positive or negative integer. If `k` is positive, `nil`s
are inserted at the beginning of the vector, otherwise they are
inserted at the end.

Source | Google | Stack overflow

Edit

git clone [email protected]:sciruby/daru.git
cd daru
open lib/daru/vector.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Daru--Vector-lag-for-pr

# Commit to git

git add lib/daru/vector.rbgit commit -m "better docs for Daru::Vector#lag"

# 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--Vector-lag-for-pr

hub pull-request

# Celebrate!