title: How to add certain number of seconds to Sys.time()?
body: <p>I was able to get current system time in R using Sys.time() as follows</p>
  
  <pre><code>&gt; Sys.time()
  [1] "2015-07-10 13:03:21 PDT"
  </code></pre>
  
  <p>But how can I add a certain number of seconds, say 5 seconds so the time would look like "2015-07-10 13:03:26 PDT"</p>
  
  <p>Or maybe add 90 seconds, so the time would look like "2015-07-10 13:04:51 PDT"</p>