title: ts(1:47, frequency=12, start=c(1959, 2)) : What does the 2 in c() do?
body: <p>Basic R question.
  What does the 2 in c() do to generate the monthly time series data? Also, is frequency=12 a default which will always give me jan to dec columns? </p>
  
  <pre><code>ts(1:47, frequency=12, start=c(1959, 2)) 
  </code></pre>