# x46.txt # # Discussion: # # The L1 solution is (1,0). # # Reference: # # Helmut Spaeth, # Mathematical Algorithms for Linear Regression, # Academic Press, 1991, # ISBN 0-12-656460-4. # 4 columns 3 rows Index A1 A2 B 1 1 0 1 2 0 1 1 3 1 1 1