Posts Tagged ‘rubygems’

I just published the simple-random ruby gem, which is ported from C# code by John D. Cook.  You can view the source on github or install the gem via rubygems:

gem install simple-random

The gem allows you to sample from the following distributions:

  • Beta
  • Cauchy
  • Chi Square
  • Exponential
  • Gamma
  • Inverse Gamma
  • Laplace (double exponential)
  • Normal
  • Student t
  • Uniform
  • Weibull

Simple examples:

require 'rubygems'
require 'simple-random'

r =
r.uniform # => 0.127064087195322
r.normal(5, 1) # => 5.71972152940515


Wordnik Gem

Posted: 12 March 2010 in Uncategorized
Tags: , , , , ,

Erin McKean

I’ve had my eye on Wordnik for a while, since finding out the excellent lexicographer Erin McKean co-founded it. ¬†Wordnik is the most comprehensive dictionary in the known universe. ¬†Srsly!

They released an API a few months ago and I quickly threw together a gem wrapping it, based on HTTParty. ¬†Tonight I updated the gem for version 3 of the API and simplified it to just a single class with the bare essentials. ¬†You can perform pretty much all of the API calls and get a hash of the results. ¬†It’s nothing major, but will give you a chance to play around with the Wordnik API with almost no work on your part (aside from getting yourself a key). ¬†This change breaks backwards compatibility completely, sorry.

Example usage:

w.define('gem') # => big hash with all the definitions
w.examples('gem') # => example sentences using "gem"

You can grab the gem off of RubyGems or you can take a look at the source on github.  As always, please let me know if you encounter any problems.

works-on-my-machine-starburstA while back I ported David Blei’s lda-c code for performing Latent Dirichlet Allocation to Ruby. ¬†Basically I just wrapped the C methods in a Ruby class, turned it into a gem, and called it a day. ¬†The result was a bit ugly and unwieldy, like most research code. ¬†A few months later, Todd Fisher came along and discovered a couple bugs and memory leaks in the C code, for which I am very grateful. ¬†I had been toying with the idea of improving the Ruby code, and embarked on a mission to do so. ¬†The result is a hopefully much cleaner gem that can be used right out of the box with little screwing around.

Unfortunately, I did something I’m ashamed of. ¬†Ruby gems are notorious for breaking backwards compatibility, and I have done just that. ¬†The good news is, your code will almost work, assuming you didn’t start diving into the Document and Corpus classes too heavily. ¬†If you did, then you will probably experience a lot of breakage. ¬†The result, I hope is a more sensical implementation, however, so maybe you won’t hate me. ¬†Of course, I could be wrong and my implementation is still crap. ¬†If that’s the case, please let me know what needs to be improved.

To install the gem:

gem sources -a
sudo gem install ealdent-lda-ruby


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