% 1. Title: 1984 United States Congressional Voting Records Database
% 
% 2. Source Information:
%     (a) Source:  Congressional Quarterly Almanac, 98th Congress, 
%                  2nd session 1984, Volume XL: Congressional Quarterly Inc. 
%                  Washington, D.C., 1985.
%     (b) Donor: Jeff Schlimmer (Jeffrey.Schlimmer@a.gp.cs.cmu.edu)
%     (c) Date: 27 April 1987 
% 
% 4. Relevant Information:
%       This data set includes votes for each of the U.S. House of
%       Representatives Congressmen on the 16 key votes identified by the
%       CQA.  The CQA lists nine different types of votes: voted for, paired
%       for, and announced for (these three simplified to yea), voted
%       against, paired against, and announced against (these three
%       simplified to nay), voted present, voted present to avoid conflict
%       of interest, and did not vote or otherwise make a position known
%       (these three simplified to an unknown disposition).
%
% 5. Number of Instances: 435 (267 democrats, 168 republicans)
%
% MSB NOTE: Any voting record (instance) that contained >=1 unknowns was removed.
% MSB NOTE: This left only 232 of the original 435 instances.
%
% 6. Number of Attributes: 16 + class name = 17 (all Boolean valued)
%
% MSB NOTE: All attribute values were changed to 0s and 1s as noted below
%
% 7. Attribute Information:
%   1. Class Name: 2 (0=democrat, 1=republican)
%   2. handicapped-infants: 2 (1=y,0=n)
%   3. water-project-cost-sharing: 2 (1=y,0=n)
%   4. adoption-of-the-budget-resolution: 2 (1=y,0=n)
%   5. physician-fee-freeze: 2 (1=y,0=n)
%   6. el-salvador-aid: 2 (1=y,0=n)
%   7. religious-groups-in-schools: 2 (1=y,0=n)
%   8. anti-satellite-test-ban: 2 (1=y,0=n)
%   9. aid-to-nicaraguan-contras: 2 (1=y,0=n)
%  10. mx-missile: 2 (1=y,0=n)
%  11. immigration: 2 (1=y,0=n)
%  12. synfuels-corporation-cutback: 2 (1=y,0=n)
%  13. education-spending: 2 (1=y,0=n)
%  14. superfund-right-to-sue: 2 (1=y,0=n)
%  15. crime: 2 (1=y,0=n)
%  16. duty-free-exports: 2 (1=y,0=n)
%  17. export-administration-act-south-africa: 2 (1=y,0=n)
%

N=232;

table=[ ...
0,0,1,1,0,1,1,0,0,0,0,0,0,1,1,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
1,1,0,0,1,1,0,1,1,1,0,0,1,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,1,1,1,0,0,0,1,1,1,1,0,0,1,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,1,1,0,1,1,1,0,0,0,0,0,0,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,1,0,1,0,0,0,1,1,1,1,1,0,1,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
0,1,1,1,0,0,0,1,1,0,0,0,0,0,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
1,1,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
1,0,1,0,1,1,1,0,0,0,1,1,1,1,1,0,0; ...
1,0,1,0,1,1,1,0,0,0,1,1,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,0,1; ...
1,1,1,0,1,1,1,1,0,0,0,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,1,0,0,0,1,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
1,1,1,1,1,0,0,1,1,1,1,1,0,0,1,0,1; ...
1,1,0,1,1,1,0,1,0,1,1,0,0,1,1,0,1; ...
0,1,0,1,0,0,1,1,1,1,1,1,0,0,1,1,1; ...
0,0,1,1,1,1,1,0,0,0,1,1,0,1,1,0,0; ...
0,0,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1; ...
0,1,1,1,0,1,1,0,0,0,1,1,0,1,1,0,1; ...
1,0,0,0,1,1,0,0,0,0,1,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,0,0,1,0,1,1,0,0,0,1,1,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,0,1,1,0,1,1,1,0,1,1,1,0,1,1,0,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,0,1,1,1,0,0,0,1,1; ...
0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,1; ...
0,1,0,0,0,1,1,1,0,0,1,1,0,0,1,0,1; ...
0,1,1,1,0,0,1,1,1,1,1,0,0,0,0,0,1; ...
0,1,0,0,0,1,1,0,0,0,0,1,1,0,1,0,1; ...
0,1,0,1,0,1,1,1,0,0,0,1,0,0,1,0,1; ...
0,1,1,1,0,0,0,0,1,1,0,1,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
1,1,1,1,1,1,0,1,0,0,0,0,1,1,1,0,1; ...
0,0,1,1,0,0,0,0,1,1,1,1,0,0,0,1,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,0,1,0,1; ...
0,0,0,1,0,0,1,0,1,1,1,0,0,0,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
1,0,1,0,1,1,1,0,0,0,1,1,1,1,0,0,1; ...
0,0,0,1,0,0,1,1,1,1,1,0,0,0,1,0,1; ...
0,1,0,1,0,0,1,1,1,1,0,0,0,0,0,1,1; ...
1,0,0,0,1,0,0,1,1,1,1,0,0,1,1,0,1; ...
1,0,0,0,1,1,1,1,1,1,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,0,0,0,0,0,0,1,1,1,1,0,1,1,1,1,1; ...
1,0,1,0,1,1,1,0,0,0,1,1,1,1,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,1,0,0,1,0,1,1; ...
1,1,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
0,0,1,1,0,0,1,0,1,1,1,1,0,1,0,1,1; ...
0,0,0,1,0,0,1,1,1,1,1,1,0,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,1,1,0,1,1,1,1,0,0,0,0,1,1,1,0,0; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,0,1,0,0,1,1,0,0,0,0,0,1,1,1,1,1; ...
0,0,0,0,0,1,1,1,0,0,0,0,1,1,1,0,1; ...
0,0,1,1,0,1,1,1,0,0,0,1,1,1,1,0,1; ...
1,0,1,0,1,1,1,1,0,0,0,0,1,1,1,0,1; ...
1,1,0,1,1,1,1,1,1,0,1,0,1,0,1,1,1; ...
1,1,0,1,1,1,1,1,1,0,1,1,1,0,1,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,1,0,0,1,0,1; ...
0,0,0,0,0,1,1,0,0,0,1,1,1,1,1,0,1; ...
0,0,1,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
1,0,0,1,1,0,0,1,1,1,1,0,0,0,1,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
0,0,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
0,0,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
0,0,1,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,0,0,0,0,0,1,1,1,1,0,1,0,0,1,1,1; ...
0,0,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,0,0,1,0,0,0,1,1,1,0,0,0,0,1,1,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,0,1,0,0,1,1,1,1,1,1,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
1,0,0,1,1,1,1,1,0,0,0,0,1,1,1,0,1; ...
0,0,0,1,0,0,1,1,1,1,1,0,1,0,0,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,0,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,1,1,0,0,0,0,1; ...
0,0,0,1,0,0,1,1,1,1,0,0,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
0,0,1,1,0,0,1,0,1,1,0,1,0,1,0,1,1; ...
1,1,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,0,1,1,0,0,0,0,1,1,0,1,0,0,1,1,1; ...
1,0,0,0,1,1,0,0,0,0,0,0,1,1,1,0,1; ...
0,0,0,1,0,0,1,1,1,1,0,1,0,0,1,1,1; ...
1,0,1,1,1,1,1,1,0,1,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,1,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,0,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,0,1,0,0,1,1,1,0,0,0,1,1,0,0,1; ...
1,0,0,0,1,1,1,1,0,0,1,0,0,0,1,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,1,0,0,1,1,1; ...
0,1,0,1,0,0,0,0,1,1,1,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,1,1,1,0,0,1,1,1,1,0,0,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,0,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,1,1,1; ...
1,0,0,0,1,1,0,0,0,0,0,0,1,0,1,0,0; ...
0,0,0,1,0,0,0,1,1,1,0,1,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,0,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,0,1,0,1; ...
1,1,0,0,0,0,0,1,1,1,1,0,0,0,1,0,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
1,1,0,0,1,1,0,1,0,0,1,0,0,0,1,1,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,1,0; ...
1,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,0,0,1,0,0,0,1,1,1,1,0,0,0,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,0,0,1,0,0,1,1,1,1,1,1,0,0,0,1,1; ...
0,1,1,1,0,1,1,0,1,0,1,1,0,1,1,1,1; ...
0,1,0,1,0,0,1,1,1,0,1,1,0,1,1,1,1; ...
0,1,1,1,0,0,1,1,1,1,1,1,0,1,1,1,1; ...
1,0,0,1,1,1,1,0,0,0,1,0,1,1,1,1,1; ...
0,0,1,0,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
0,0,1,1,0,0,1,1,1,1,1,0,0,1,1,1,1; ...
1,0,0,0,1,1,0,1,1,1,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,1,0,0,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,1,0,0,0,0,1,1,1,1,1,0,0,0,1,1,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,1,0; ...
0,0,0,1,0,0,1,1,1,1,1,0,0,1,0,0,1; ...
0,1,1,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
1,0,1,1,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,1,0,1,1,1,1,1,0,0,1,1,1,1,1,1; ...
0,0,0,0,0,0,1,0,1,1,0,1,1,1,1,1,0; ...
0,1,0,0,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
0,0,1,1,0,0,1,0,1,1,1,0,0,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,1,0,0,1,0,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,1,1,1,1,0,0; ...
0,1,1,0,1,0,0,1,1,1,0,1,0,0,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,1,0,0,0,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
0,0,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,0,0,0,0,0,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,1,1,1; ...
1,1,0,0,1,1,1,0,0,0,0,1,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,1,1,1,0,1,0,1; ...
1,0,0,0,1,1,0,1,0,1,1,0,0,0,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1; ...
1,0,0,0,1,1,1,1,0,0,1,0,1,0,1,1,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,1,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0; ...
1,0,1,1,1,1,1,1,1,1,0,0,1,1,1,0,1; ...
0,0,1,0,0,0,1,1,0,1,0,1,0,0,0,1,1; ...
1,0,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1; ...
1,0,0,1,1,1,1,1,0,0,1,1,1,1,1,0,1; ...
1,1,0,1,1,0,0,0,1,1,1,0,0,0,1,1,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
0,1,0,1,0,0,1,1,1,1,1,0,0,1,0,0,1; ...
0,1,1,1,0,0,1,1,1,1,1,1,1,1,0,0,1; ...
1,1,1,0,1,1,1,0,0,0,1,1,0,1,0,0,0; ...
1,1,1,0,1,1,1,0,0,0,0,1,0,1,1,0,1; ...
0,0,1,0,0,1,1,0,0,0,1,1,0,1,1,0,0; ...
0,0,1,1,0,0,1,1,1,0,1,0,0,0,0,1,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,0,1,1,0,1; ...
1,0,1,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,0,1,0,1,1,1,0,0,0,0,1,1,0,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,1,1,0,1,1,0,1,1,1,1,0,0,0,0,1; ...
0,1,1,1,1,1,1,0,0,0,0,1,1,1,1,0,1; ...
0,1,1,0,0,1,1,0,0,0,0,1,1,1,1,1,0; ...
0,1,1,0,0,0,0,0,1,1,0,1,0,0,0,1,0; ...
1,1,1,0,1,1,1,0,0,0,0,1,1,1,1,0,1; ...
0,1,1,1,0,1,1,0,1,0,0,1,0,1,0,1,1; ...
0,0,1,1,0,1,1,0,1,0,0,0,0,0,0,0,1; ...
1,0,1,0,1,1,1,0,0,0,1,1,1,1,1,0,0; ...
1,1,1,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,1; ...
0,1,0,1,0,1,1,0,0,1,1,0,0,1,1,0,1; ...
0,0,0,0,1,1,1,0,0,0,0,1,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,0,1,1,1,0,0; ...
1,0,0,0,1,1,1,0,0,0,0,1,1,1,1,0,1; ...
0,1,0,1,0,0,1,1,1,1,1,1,0,0,0,0,1; ...
1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
1,1,1,0,1,1,1,0,0,0,1,0,0,1,1,0,1; ...
0,1,1,1,0,0,0,1,1,1,1,1,0,1,0,0,1; ...
0,1,1,1,0,0,0,1,1,0,1,0,0,0,0,0,1; ...
0,1,1,1,0,0,0,1,1,1,0,0,0,0,0,0,1; ...
1,1,1,1,1,1,1,1,1,0,1,0,0,1,1,0,1; ...
0,0,1,1,0,1,1,1,1,0,0,1,0,1,0,1,1; ...
0,0,0,1,0,0,1,1,1,1,0,1,0,0,0,1,1; ...
0,0,1,1,0,0,1,1,1,1,0,1,0,0,1,1,1; ...
0,1,0,1,0,0,0,1,1,1,1,0,0,0,0,1,1; ...
1,0,0,0,1,1,1,1,1,0,1,0,1,1,1,0,1; ...
1,0,0,1,1,1,1,0,0,1,1,0,1,1,1,0,1; ...
0,0,0,1,0,0,0,1,1,1,1,0,0,0,0,0,1];

% test the entropy function
entropy(0,1)
entropy(2,2)
entropy(9,5)

% same one works with reals as well
entropy(0.0,1.0)
entropy(0.5,0.5)
entropy(9./14.,5./14.)

att=1:17;
pos=sum(table);
neg=sum(table==0);
[att; pos; neg; entropy(pos,neg)]'