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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