I have been using the [Spreadsheet::ParseExcel](http://search.cpan.org/dist/Spreadsheet-ParseExcel/) to list the contents of spreadsheet. I've seen several examples on how to dump the entire spreadsheet. I really would like to see how to use this script more selectively. 

The example below from IBM basically dumps the content of all cells that have data. 

```
#!/usr/bin/perl -w

use strict;
use Spreadsheet::ParseExcel;

my $oExcel = new Spreadsheet::ParseExcel;

die "You must provide a filename to $0 to be parsed as an Excel file" unless @ARGV;

my $oBook = $oExcel->Parse($ARGV[0]);
my($iR, $iC, $oWkS, $oWkC);
print "FILE  :", $oBook->{File} , "\n";
print "COUNT :", $oBook->{SheetCount} , "\n";

print "AUTHOR:", $oBook->{Author} , "\n"
 if defined $oBook->{Author};

for(my $iSheet=0; $iSheet < $oBook->{SheetCount} ; $iSheet++)
{
 $oWkS = $oBook->{Worksheet}[$iSheet];
 print "--------- SHEET:", $oWkS->{Name}, "\n";
 for(my $iR = $oWkS->{MinRow} ;
     defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ;
     $iR++)
 {
  for(my $iC = $oWkS->{MinCol} ;
      defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ;
      $iC++)
  {
   $oWkC = $oWkS->{Cells}[$iR][$iC];
   print "( $iR , $iC ) =>", $oWkC->Value, "\n" if($oWkC);
  }
 }
}

```

Can someone give me an example of how I can specify some action to take for a certain column for every row?

For example, I have a spreadsheet with 7 columns and n rows. I want to reformat the data in each of the columns in a certain way. Perhaps I want take column 6 for every row and append some text to the end of the string stored in the cell. How would that be set up?