congress number
roll call number
H=House, S=Senate
total yeas
total nays
day of month
total correctly classified
Predicted Yea/Actual Yea
Predicted Yea/Actual Nay
Predicted Nay/Actual Yea
Predicted Nay/Actual Nay
proportion correctly classified
proportional reduction in error
geometric mean probability
spread on 1st dimension
midpoint on 1st dimension
spread on 2nd dimension
midpoint on 2nd dimension
cutting line angle (-90 to +90 degrees)