title: writing to a tab-delimited file or a csv file
body: <p>I have a RMA normalized data ( from the CEL files ) and would like to write it into a file that I could open in excel but have some problems.</p>
  
  <pre><code>library(affy)
  cel &lt;- ReadAffy()
  pre&lt;-rma(cel)
  write.table(pre, file="norm.txt", sep="\t")
  write.table(pre, file="norma.txt")
  </code></pre>
  
  <p>The outut is arranged row-wise in the text file that is written using the above command and hence when exported to excel it is in a wrong form and many of the information is cut off as the maximum rows are used up .The output looks the following way :</p>
  
  <pre><code>GSM 133971.CEL 5.85302 3.54678 6.57648 9.45634
  GSM 133972.CEL 4.65784 3.64578 3.54213 7.89566
  GSM 133973.CEL 6.78543 3.54623 2.54345 7.89767   
  </code></pre>
  
  <p>How to write it in a proper format from CEL files in R to a notepad or  excel ?</p>