title: Delete specific row in a data frame?
body: <p>I have a data frame that looks like this:</p>
  
  <pre><code>            col1     col2     col3 
  1             0        1       5
  2             0        3       0
  3             5        4       5
  4             5        5       0
  5             5        3       7
  </code></pre>
  
  <p>I want to delete every row that contains the string '0' in column 'col1' and '5' in column 'col3'. How can I accomplish this in R?</p>
  
  <pre><code>            col1     col2     col3 
  2             0        3       0
  3             5        4       5
  4             5        5       0
  5             5        3       7
  </code></pre>
  
  <p>Thank U.</p>