whereis

WHEREIS    Fast search for M-files using a database.
   WHEREIS ABC XYZ ... looks through a database of help files (H1 lines
   in m-files) for keywords ABC, XYZ, ...  There can be as many keywords
   as desired.

   WHEREIS is very similar to LOOKFOR, except that it searches through a
   database file called m_files.mat, so it is much faster.  Also unlike
   LOOKFOR, it accepts multiple keywords.

   m_files.mat should be created beforehand by running ADD2DATABASE.
   New or updated help entries can be added to the database.  m_files.mat
   must reside in the same directory as WHEREIS.M.

   WHEREIS by itself invokes a GUI version of the search program.  It is a
   real-time interactive search, in which a search is performed for every
   key stroke.

   WHEREIS(DATABASE) invokes the GUI search program using a specified DATABASE.   

   See also LOOKFOR, ADD2DATABASE

   Jiro Doke
   July 2004