title: Removing "\N" values in a data frame
body: <p>I have a data frame where one column is a character type. Some values are having "\N" written in that column and I want to remove the rows containing those values from the data frame. I could not figure it  out 
  The current code what I am using is :
      airports_m&lt;-airports_m[airports_m$IATA != "\N",] 
  This gives the error</p>
  
  <pre><code>Error: '\N' is an unrecognized escape in character string starting ""\N"
  </code></pre>
  
  <p>Please help</p>