title: Autocorrelation scatterplot for a special lag
body: <p>I am using <code>acf</code> function to calculate Autocorrelation. I want to have a scatter plot for a special lag for example lag 2. Does it possible to do it with <code>acf</code> function.</p>
  
  <p>Is there any package that help me to have a scatter plot for each lag?</p>