title: R Reading a File with read.csv
body: <p>I am trying to read a file with read.csv in R. Unfortunately, some of the records in the file have the following format:</p>
  
  <pre><code>16-Oct-14,6,14228,441,1035,643,921,4679,679,84,2707,370,1322,12882,"-1,346"
  </code></pre>
  
  <p>Is there anyway I can read the last column as numeric instead of character? To be more precise "1,346" should be read as a decimal numeric.</p>
  
  <pre><code>dem2010 &lt;- read.csv("C:\\Users\\Utilisateur\\Desktop\\H2017\\Méthode de Prévision\\Sessions\\Session 1\\ZonalDemands_2003-2015.csv",
          col.names=c("Date","Hour","TotalOntario", "Northwest","Northeast","Ottawa","East","Toronto", "Essa","Bruce","Southwest","Niagara","West", "TotalZones","diff"),
          colClasses=c("character", rep("integer",13), "character"))
  </code></pre>
  
  <p>Thanks</p>