title: Importing Excel files into R, xlsx or xls
body: <p>Please can someone help me on the best way to import an excel 2007 (.xlsx) file into R. I have tried several methods and none seems to work. I have upgraded to 2.13.1, windows XP, xlsx 0.3.0, I don't know why the error keeps coming up. I tried:</p>
  
  <pre><code>AB&lt;-read.xlsx("C:/AB_DNA_Tag_Numbers.xlsx","DNA_Tag_Numbers")
  </code></pre>
  
  <p>OR</p>
  
  <pre><code>AB&lt;-read.xlsx("C:/AB_DNA_Tag_Numbers.xlsx",1)
  </code></pre>
  
  <p>but I get the error:</p>
  
  <pre><code> Error in .jnew("java/io/FileInputStream", file) : 
    java.io.FileNotFoundException: C:\AB_DNA_Tag_Numbers.xlsx (The system cannot find the file specified)
  </code></pre>
  
  <p>Thank you.</p>