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    %% Label x-Axis Ticks with 2-digit Years  
% Graph population data for the 20th Century taken from the 1990 US census
% and label _x_-axis ticks with 2-digit years.   

% Copyright 2015 The MathWorks, Inc.


%% 
% Create time data by decade. 
t = (1900:10:1990)';  

%% 
% Enter total population counts for the USA. 
p = [75.995 91.972 105.711 123.203 131.669 ...
	150.697 179.323 203.212 226.505 249.633]';  

%% 
% Convert years to serial date numbers using the |datenum| function, and
% then create a bar graph of the data. 
figure
bar(datenum(t,1,1),p)	

%% 
% Replace _x_-axis ticks with 2-digit years. The numeric identifier |11|
% corresponds to the predefined MATLAB(R) date format |'yy'|. 
dateFormat = 11;
datetick('x',dateFormat)