title: Read fixed width text file
body: <p>I'm trying to load this ugly-formatted data-set into my R session:
  <a href="http://www.cpc.ncep.noaa.gov/data/indices/wksst8110.for">http://www.cpc.ncep.noaa.gov/data/indices/wksst8110.for</a></p>
  
  <pre><code>Weekly SST data starts week centered on 3Jan1990
  
  Nino1+2      Nino3        Nino34        Nino4
  Week          SST SSTA     SST SSTA     SST SSTA     SST SSTA 
  03JAN1990     23.4-0.4     25.1-0.3     26.6 0.0     28.6 0.3 
  10JAN1990     23.4-0.8     25.2-0.3     26.6 0.1     28.6 0.3 
  17JAN1990     24.2-0.3     25.3-0.3     26.5-0.1     28.6 0.3
  </code></pre>
  
  <p>So far, i can read the lines with</p>
  
  <pre><code>  x = readLines(path)
  </code></pre>
  
  <p>But the file mixes 'white space' with '-' as separators, and i'm not a regex expert.
  I Appreciate any help on turning this into a nice and clean R data-frame.
  thanks!</p>