title: Are Snowball & SnowballC packages different in R?
body: <p>I am using <code>stemDocument</code> for stemming text document using <code>tm</code> package in R. Example code: </p>
  
  <pre><code>data("crude")
  crude[[1]]
  stemDocument(crude[[1]])
  </code></pre>
  
  <p>I get an error message:</p>
  
  <blockquote>
    <p>Error in loadNamespace(name) : there is no package called ‘Snowball’</p>
  </blockquote>
  
  <p>I have installed <code>SnowballC</code> package and unable to find Snowball package. Below is my <code>sessionInfo()</code>:</p>
  
  <pre><code>R version 2.15.3 (2013-03-01)
  Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
  
  locale:
  [1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] SnowballC_0.5 tm_0.5-8.3   
  
  loaded via a namespace (and not attached):
  [1] slam_0.1-31  tools_2.15.3
  </code></pre>
  
  <p>Does it require any other package or Snowball?</p>