Missing features...

[David G. Stork]

There is a provably optimal method for performing classification with
missing inputs, described in Chapter 2 of "Pattern Classification and
Scene Analysis" (2nd ed.) by R. O. Duda, P. E. Hart and D. G. Stork,
which avoids the ad-hoc heuristics that have been described by others.
Those interested in obtaining Chapter two via ftp should contact me.

Dr. David G. Stork
Chief Scientist and
Head, Machine Learning and Perception
Ricoh California Research Center
2882 Sand Hill Road  Suite 115
Menlo Park, CA 94025-7022 USA
415-496-5720 (w)
415-854-8740 (fax)
stork at crc.ricoh.com