# rinruby

### DESCRIPTION

RinRuby is a Ruby library that integrates the R interpreter in Ruby, making R's statistical routines and graphics available within Ruby. The library consists of a single Ruby script that is simple to install and does not require any special compilation or installation of R. Since the library is 100% pure Ruby, it works on a variety of operating systems, Ruby implementations, and versions of R. RinRuby's methods are simple, making for readable code. The website *rinruby.ddahl.org* describes RinRuby usage, provides comprehensive documentation, gives several examples, and discusses RinRuby's implementation.

Copyright 2005-2008 David B. Dahl

Developed by David B. Dahl. Documented by David B. Dahl and Scott Crawford

Homepage: http://rinruby.ddahl.org

*Maintainer*: Claudio Bustos

*Contributors*:

### FEATURES/PROBLEMS

- Pure Ruby. Works on Ruby 2.1, 2.2, 2.4 and JRuby-head (2018/03/29). There isn't any specific code that impides to use Ruby < 2.0, but is deprecated.
- Slower than RSRuby, but more robust

### SYNOPSIS

Below is a simple example of RinRuby usage for simple linear regression. The simulation parameters are defined in Ruby, computations are performed in R, and Ruby reports the results. In a more elaborate application, the simulation parameter might come from input from a graphical user interface, the statistical analysis might be more involved, and the results might be an HTML page or PDF report.

#### Code

```
require "rinruby"
n = 10
beta_0 = 1
beta_1 = 0.25
alpha = 0.05
seed = 23423
R.x = (1..n).entries
R.eval <<EOF
set.seed(#{seed})
y <- #{beta_0} + #{beta_1}*x + rnorm(#{n})
fit <- lm( y ~ x )
est <- round(coef(fit),3)
pvalue <- summary(fit)$coefficients[2,4]
EOF
puts "E(y|x) ~= #{R.est[0]} + #{R.est[1]} * x"
if R.pvalue < alpha
puts "Reject the null hypothesis and conclude that x and y are related."
else
puts "There is insufficient evidence to conclude that x and y are related."
end
```

#### Output

```
E(y|x) ~= 1.264 + 0.273 * x
Reject the null hypothesis and conclude that x and y are related.
```

### REQUIREMENTS

- R

### INSTALL

- sudo gem install rinruby

### LICENSE

GPL-3. See LICENSE.txt for more information.