title: make new dataframe meeting a specific criteria
body: <p>I have a data frame with four variables (a,b,c,d) and 365 entries per variable</p>
  
  <p>df</p>
  
  <pre><code>a     b     c       d
  a1    b1    c1     d1 
  .     .     .       .
  .     .     .       . 
  a365 b365  c365   d365
  </code></pre>
  
  <p>I need to do two things:</p>
  
  <p>1) Select the row where which meets the criteria of d > 0.28 and a > 2.3. I did this using this:</p>
  
  <pre><code>cond_1 &lt;- d &gt; 0.28 &amp; a &gt; 2.3
  </code></pre>
  
  <p>Lets say, the first row which meets the criteria is row 7. How can I make a new data frame starting row 7 onwards and discarding the rows prior to row 7? ( I need to include all row after 7th row irrespective of whether they meet the criteria or not)</p>
  
  <p>Thanks a lot</p>