%ISLETTER True for letters of the alphabet.
%   For a string S, ISLETTER(S) is 1 for letters of the alphabet
%   and 0 otherwise.
%
%   Character sets supported:
%      PC   : Windows Latin-1
%      Other: ISO Latin-1 (ISO 8859-1)
%
%   See also ISSPACE.

%   Copyright 1984-2000 The MathWorks, Inc. 
%   $Revision: 5.8 $  $Date: 2000/06/01 15:23:36 $


%   Built-in function.
