SharePoint 2010 number field display without ","

A common request is to display number fields in SharePoint 2010 lists without commas. For example, if you had a list of books that included PublicationYear column, it would format the values as:
2,001
1,998
2,011

This is confusing to the viewer, as values no longer look like years.

The most frequent suggestion is to create an additional field that calculates a value based on the Number field and ignores all non-numeric parts. This is relatively straightforward, and can be accomplished entirely within the browser:

=TEXT([MyNumericData], "0")

Or, in a case where you’d like to retain two digits after the decimal:
=TEXT([MyNumericData], "0.00")

SharePoint appears to store the data in its numeric format in a another column, hidden to the browser but visible in SharePoint Designer. It’s [column name] followed by a period. For example, I created a field called MyNumericData, so the hidden field is MyNumericData. Again:
MyNumericData
MyNumericData.

Adding this to a view via SharePoint Designer is non-obvious. Here are the steps I used:
Click on a data item in Design mode until you see a tab labeled xsl:value-of:



SharePoint Designer 2010 Design Mode
Right-click the item and select Edit Formula
Remove the current XPath expression
Add the MyNumericData. row from the fields pane
Add the format-number function from the Math / Number functions
Add the appropriate format pattern (e.g. ‘#’)

The appropriate format pattern depends on how you wish to display the data:
Display integer value:
format-number($thisNode/@MyNumericData.,'#')
Always display two digits after the decimal:
format-number($thisNode/@MyNumericData.,'0.00')
Display up to 2 digits after the decimal:
format-number($thisNode/@MyNumericData.,'#.##')

If you look at the code view after making these changes, you will see that SharePoint Designer added a hefty chunk of XSL to the XsltListViewWebPart.

Is there any advantage to this method over adding a calculated field? Not as far as I can tell–but it’s interesting to note that there is more than one overly-complicated solution to what seems like a trivial problem.

- See more at: http://osric.com/chris/accidental-developer/2011/11/displaying-numeric-fields-in-sharepoint-2010-without-commas/#sthash.Rr8NzTgL.dpuf