%ELSEIF IF statement condition.
%   ELSEIF is used with IF. The statements after the ELSEIF are
%   executed if the expression is true and all the preceding IF and
%   ELSEIF expressions are false. An expression is considered true if
%   the real part has all non-zero elements.  
%
%   ELSEIF does not need a matching END, while ELSE IF does.
%
%   The general form of the IF statement is
%      IF expression
%        statements
%      ELSEIF expression
%        statements
%      ELSE
%        statements
%      END
%
%   See also IF, ELSE, END.

%   Copyright 1984-2002 The MathWorks, Inc. 
%   $Revision: 5.10 $  $Date: 2002/04/15 04:16:19 $
%   Built-in function.