Db: Numerical Data Base

Modules
	Getting and Setting functions by Locator
	Variable designation (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

Here are the implementation of several functions regarding the manipulation of the Numerical Data Base

These operations are generic: they are available for any class derived from the Db one (such as DbGrid).