title: Summary statistics using apply family for different factor levels
body: <p>I am trying to find the summary statistics for different factor levels.  </p>
  
  <pre><code>data.frame(apply(final_data[Company=="BPO",c(66:84)],2,summary))  
  </code></pre>
  
  <p>Now I have different values for <code>company</code> - i can repeat the statement for different values.  I know it can be automated - using apply family (<code>ddply</code>,<code>tapply</code>,<code>sapply</code>), but I am not getting it right.</p>