RType

RType extend RSRuby to be rubyist can use R in a more Ruby way.

RSRuby provide to access R functions and variables from Ruby and basic class conversion. And RType provide extended class conversion that convert R class to appropriate Ruby class that has many convenient methods.

Convert R class to RType

• matrix => RType::Matrix
• numeric => RType::Numeric
• vector => RType::Vector
• list => RType::List
• array => RType::Array
• data.frame => RType::DataFrame
• character => RType::String
• other => RType::Base

Installation

Add this line to your application's Gemfile:

gem 'r_type'

And then execute:

$ bundle

Or install it yourself as:

$ gem install r_type

Usage

Interactive Console

Execute r_console to open interactive RType console.

r_console

> m = matrix (1..9).to_a, ncol: 3
=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]

> print m * m
     [,1] [,2] [,3]
[1,]   30   66  102
[2,]   36   81  126
[3,]   42   96  150

Use RType in your Ruby Class

• Simple script

a = RType::Matrix.new [1,2,3, 4,5,6], ncol: 2
b = RType::Matrix.new [10, 100], ncol: 1

RType::R.print a * b

#      [,1]
# [1,]  410
# [2,]  520
# [3,]  630

When you haven't define ::R constant in your code, RType define ::R as alias of RType::R. So, you can write following code.

a = R::Matrix.new [1,2,3, 4,5,6], ncol: 2
b = R::Matrix.new [10, 100], ncol: 1

R.print a * b

• In RType::R context

R.run call given block in RType::R context.

R.run do
  a = matrix [1,2,3, 4,5,6], ncol: 2
  b = matrix [10, 100], ncol: 1
  print a * b
end

#      [,1]
# [1,]  410
# [2,]  520
# [3,]  630

• Assign a variable from Ruby and use it in R

Call RType::R.eval_R with a string that has R code.

# assign a value from Ruby
R.hoge = [1,2,3,4,5]

# eval R code
R.eval_R <<RTEXT
  f = function(x) x * 100
  result = sapply(hoge, f)
  print(result)
RTEXT

Or, you can use inline eval_R when RType::R context.

R.run do
  hoge = [1,2,3,4,5]
  result = sapply hoge, `function(x) x * 100`
  print result
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request