This module is used to write data to MS Excel files. The module can be used to write data to a single Excel file or to a series of Excel files that are date stamped (e.g. data20080101.xls, data20080102.xls, etc.). To write a series of Excel files that are date stamped, define the file directory, file prefix (e.g. data.), file date format (e.g. yyyyMMdd) and file suffix (e.g. .xls).