title: read.csv falsly converts string to integer
body: <p>I would like to read a csv file but there are columns that contain strings of digits (string variable). The values in the csv file are quoted ("") so easily identifyable as string variables but for some reason they end up as integer in my data.frame. </p>
  
  <p>Here is the head of the csv</p>
  
  <pre><code>"task","itemnr","respnr","checked","solution","score","userid","filenr","timestamp","swmClicks","swmRT"
  "swm",1,"E1","010010010","000111000",0,"77279","77279","2017-02-14T12:58:56.457+0430",3,13.0379998683929
  "swm",10,"E1","011001000","011001000",1,"77279","77279","2017-02-14T13:01:50.717+0430",6,20.4059998989105
  </code></pre>
  
  <p>The problem is with the 4th and 5th column. </p>
  
  <p>This is the code I use. Anything wrong with it?</p>
  
  <pre><code>datSwm &lt;- read.csv("datSwm.csv", header=T, stringsAsFactors=FALSE, quote='\"')
  </code></pre>