title: remove row with nan value
body: <p>let's say, for example, i have this data:</p>
  
  <pre><code>data &lt;- c(1,2,3,4,5,6,NaN,5,9,NaN,23,9)
  attr(data,"dim") &lt;- c(6,2)
  data
  
       [,1] [,2]
  [1,]    1  NaN
  [2,]    2    5
  [3,]    3    9
  [4,]    4  NaN
  [5,]    5   23
  [6,]    6    9
  </code></pre>
  
  <p>Now i want to remove the rows with the NaN values in it: row 1 and 4.
  But i don't know where these rows are, if it's a dataset of 100.000+ rows, so i need to find them with a function and remove the complete row.</p>
  
  <p>Can anybody point me in the right direction?</p>