% It reads an existing contingency table with supplementary observations and performs 
% a simple correspondence analysis. The data are populations of the 50 U.S. states,
% rouped into regions, for each of the census years from 1920 to 1970 (U.S. Bureau 
% of the Census; 1979). Alaska and Hawaii are treated as supplementary regions, 
% because they were not states during this entire period and are not physically 
% connected to the other 48 states. Consequently, it is reasonable to expect that 
% population changes in these two states operate differently from population changes
% in the other states.

N =[
        7401       22261       21476       12544       13990        8893       10242        3336        5567          55         256
        8166       26261       25297       13297       15794        9887       12177        3702        8195          59         368
        8437       27539       26626       13517       17823       10778       13065        4150        9733          73         423
        9314       30146       30399       14061       21182       11447       14538        5075       14486         129         500
       10509       34168       36225       15394       25972       12050       16951        6855       20339         226         633
       11842       37199       40252       16319       30671       12803       19321        8282       25454         300         769
   ];

labels.rows={'1920','1930','1940','1950','1960','1970'};
labels.columns={'New England','NY, NJ, PA', 'Great Lakes', 'Midwest', 'South Atlantic', 'KY, TN, AL, MS', 'AR, LA, OK, TX', 'Mountain', 'Pacific', 'Alaska','Hawaii'};           
