title: Creating a sequential list of letters with R
body: <p>I would like to be able to create a sequence of letters in R (to assist in importing data from a SPSS file)</p>
  
  <p>It's quite easy to create a sequence of numbers, for example:</p>
  
  <pre><code>seq(1,1000)
  [1] 1 2 3 4 5 6 ... 1000
  
  paste("something_",1:12,sep="")
  [1] something1 something2 ... something12
  </code></pre>
  
  <p>But is there any functionality for appending, pasting, or creating sequences of letters like this? </p>
  
  <pre><code>paste("This_",a:z,sep="")
  [1]This_a This_b This_c ... This_4z
  </code></pre>
  
  <p>Thanks in advance! </p>