GRand
I needed something similar to nrand in numpy. see - https://docs.scipy.org/doc/numpy/reference/generated/numpy.random.randn.html
Installation
Add this line to your application's Gemfile:
gem 'grand'And then execute:
$ bundle
Or install it yourself as:
$ gem install grand
Usage
> require 'grand'
=> true
> GRand.randn
=> 0.8459468356387407
> GRand.randn(1, 2)
=> [[-0.5259311445434742, 0.5058339155942712]]
> GRand.rand(n3, 2)
=> [[1.0015454079393156, -0.2544992806165275], [-0.7978337095145441, -1.7813946216288779], [0.9631364295796622, 2.157358119782299]]
> GRand.randn(2, 1)
=> [[-0.634759160869425], [0.549004503513128]]
> GRand.randn(3, 3, 3)
=> [[[-1.689589847133065, -0.41054654640696786, 0.36381728856120105], [-0.9437196021569799, 1.19558636009585, -1.1605453269136559], [1.0837506708104712, -1.1395537425254014, 0.5925022408229144]], [[-1.7133014088074843, -0.805051352081152, 0.3746241803203248], [0.3642622933280586, 0.5843943798812012, 1.141236536447513], [-0.25543269419159714, 1.1743836190357984, -0.5161554049975062]], [[-0.03303459622587511, -3.5547854922416438, 0.17581738567933877], [-0.979119743081027, 1.397273496753393, 0.18670646583239753], [-0.26985128879011183, -0.5662975999343106, 0.46600852896034334]]]
Development
After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/gregors/grand.