title: Extracting rows based on the value
body: <p>I have tab delim text file which contains the following columns:</p>
  
  <pre><code>Probe    A_sig  A_Pval  
  ILMN_122 12.31   0.04    
  ILMN_456 56.12   0      
  ILMN_198 981.2   0.06    
  ILMN_980 876.0   0.001   
  ILMN_542 123.9   0.16     
  ILMN_567 134.1   0      
  ILMN_452 213.4   0.98     
  ILMN_142 543.8   0.04  
  ILMN_765 187.4   0.05    
  </code></pre>
  
  <p>Now I want to take out those rows which has the Pval &lt;.05. The output should look like</p>
  
  <pre><code>     Probe     A_sig   A_Pval  
     ILMN_122     12.31   0.04  
     ILMN_980     876.0   0.001   
     ILMN_142     543.8   0.04   
  </code></pre>
  
  <p>Can anyone please help me?</p>