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Figure 2.3  Recovering the Legislator Points

                 Roll Calls
Legislators  1   3   5   4   2 
________________________________
   Five      N   Y   N   N   N 
   Six       N   Y   Y   N   N 
   Four      N   Y   N   Y   N 
   One       Y   N   N   Y   Y 
   Two       N   N   N   Y   Y 
   Three     N   N   N   Y   N 
_______________________________

   Agreement Scores                 Squared Distances
1.0                            .00
 .8  1.0                       .04  .00
 .8   .6  1.0                  .04  .16  .00
 .2   .0   .4  1.0             .64 1.00  .36  .00
 .4   .2   .6   .8  1.0        .36  .64  .16  .04  .00
 .6   .4   .8   .6   .8  1.0   .16  .36  .04  .16  .04  .00

     Double-Centered Matrix        Legislator Points
   .09                                  X5 =  .3  
   .15  .25                             X6 =  .5  
   .03  .05  .01                        X4 =  .1  
  -.15 -.25 -.05  .25                   X1 = -.5  
  -.09 -.15 -.03  .15  .09              X2 = -.3  
  -.03 -.05 -.01  .05  .03  .01         X3 = -.1