This depends upon how you are writing it to file.  If you are using the "Export Waveforms to Spreadsheet File" VI, then you can actually just open this file with Excel and you will see all of the data fine.  That's the easiest way to do it.  If you are wanting to write to Excel directly, you can use ActiveX calls to do this.  If you choose the latter, I would suggest purchasing the Report Generation for Microsoft Office Toolset for LabVIEW.  It provides VIs which write your data directly to Excel files. 
					
				
			
			
				
	J.R. Allen