Db: Numerical Data Base

Modules
	Reset the contents of an already existing Db
	Creating a Db structure
	Manipulating Names of the variables contained in a Db
	Getting and Setting functions by Locator
	Designating Variables (used for simulations in particular)
	Reading one or several Columns
	Deleting one or several Columns
	Calculating Spatial characteristics on the Db
	Calculating basic Statistics
	Checking validity for various parameters
	Calculating several statistics in Db
	Calculating correlations on variables of a Db

Detailed Description