title: Read csv with dates and numbers
body: <p>I have a problem when I import a csv file with R:</p>
  
  <p>example lines to import:</p>
  
  <pre><code>2010-07-27;91
  2010-07-26;93
  2010-07-23;88
  </code></pre>
  
  <p>I use the statement:</p>
  
  <pre><code>data &lt;- read.csv2(file="...", sep=";", dec=".", header=FALSE)
  </code></pre>
  
  <p>when I try to aggregate this data with other ones originated by statistical analysis using <code>cbind</code>, the date is showed as an integer number because it was imported as factor.</p>
  
  <p>If I try to show it as a string using <code>as.character</code>, the numerical data are transformed into characters too so they are unusable for statistical procedures.</p>