title: filepath check in R both absolute and relative
body: <p>I have no idea how to do this.
  i have a list of filepath in a column. Now i want to check if at all the filepath is absolute path or not based on both windows or Linux system.</p>
  
  <p>Ex- </p>
  
  <pre><code>somefunction("C:\eclipse-standard-kepler-SR1-win32\eclipse")
  ANS: absolutepath or T 
  </code></pre>