Can Ruby interface with r?
A friend needs to do some R programming for her PhD and since I'm a programmer, asked me to give her a hand.
So I took a 开发者_StackOverflow中文版look at some r related webstuff and discovered that you can interact with it through RPy (python) and statistics::R (perl). Is there a way for Rubyists to hook into R?
Is there a dummy's guide to learning R (like a video series)?
This presentation summarises the alternatives.
Libraries
- RinRuby
- RSRuby
Both discussed in others' answers, both haven't been updated years.
Rserve with Ruby client
Rserve is a Java TCP/IP server that the native Ruby client can connect to.
I've just tested out this approach and it's extremely easy.
sudo apt-get install -y r-base ruby-gems # Just in case...
sudo R
> install.packages("Rserve")
> library(Rserve)
> Rserve()
# (In another window - not sure how the 'daemon mode' operates exactly.
sudo gem install rserve-client
irb
> require "rserve"
> include Rserve
> c = Connection.new
> x = c.eval("R.version.string");
> puts x.as_string
R version 2.10.1 (2009-12-14)
=> nil
rApache and Rook (formerly "rrack")
rApache is a web application framework for R (just like Rails is for Ruby). I think Rook is a shim to allow rApache to work on non-Apache webservers. So the approach here (I think) is to run rApache and Rails side by side. Your Rails app can call rApache/Rook as needed to perform queries, or to hand over control for rendering graphs etc.
See RSRuby for accessing R functionality through Ruby.
As for a beginner's tutorial, try looking at "R For Beginners". I found it helpful when I had to learn some basic R for a statistics course.
There is also a Ruby client for Rserve.
RinRuby is another project that does the Ruby/R interface.
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