Hi every body,
Yes, a missing value is a missing value and has no sense to convert it into 0. Option 2.
Greetings
Pedro
Pedro Arias Bohigas John Ericssons gatan, 12 5 tr 112 22 Stockholm Sweden Phone (cell) 0734421130 Phone (international calls)+46734421130
epidata-list@lists.umanitoba.ca