hour(d)

function h = hour(d) 
%HOUR  Hour of date or time. 
%   H = HOUR(D) returns the hour of the day given a serial date number or 
%   a date string, D. 
% 
%   For example, h = hour(728647.5590548427) or  
%   h = hour('19-Dec-1994, 13:24:08.17') returns h = 13. 
%        
%   See also DATEVEC, SECOND, MINUTE. 
 
%   Author(s): C.F. Garvin, 2-23-95 
%   Copyright 1995-2002 The MathWorks, Inc.  
%   $Revision: 1.6 $   $Date: 2002/04/14 21:51:06 $ 
 
if nargin < 1 
  error('Please enter D.') 
end 
if isstr(d) 
  d = datenum(d); 
end 
c = datevec(d(:));  % Generate date vector from date 
h = c(:,4);     % Extract hour 
if ~isstr(d) 
  h = reshape(h,size(d)); 
end