Figure 2.3  Recovering the Legislator Points
                 Roll Calls
Legislators  1   3   5   4   2 
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   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 
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   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