0.9944 0.931202287 0.7910 0.99440.01116900382150.100081-0.054070 0.931200382150.1328670.3427350.175079 0.22870.1000810.3427350.947696 0.445702 0.7910-0.054070-0.17079-04457020.374319 对x2的消去变换L=1,K=2 8953353 89032143-2471164-86817265.604968 89032143895335334215248960605-4.841078 R()=2.471164 3.421524000211300003050009923 8.681726 8.9606050.0003050.050910.038798 -5.60496848410780009923003877990.1125619 对x3的消去变换L=2,K=3 297957196-4090.5215116950497 8.32502617.209967 4090.521556299070916192730718466727-20.90913 R)=116950497-161973071473260770.143454696167 8.325026 8466727 0.1443450.0508660.037366 -1720996720.90913-46961670.0373660.0659618 对x4的消去变换L=3,K=4 4342.094 5476.235381145.880627163.6658323.325504 5476.235385631480991595.24661-1664516-27.128761 R(4)=1145880627159524661473670382728377545901316 163.66583 1664516 2.83775196594980.7345968 23.324504 7.128761 4.59013160.73459680.0385129 解得: P1=23.3255,Py2=-27.1288,P3=4.5902,P4=0.7346 3、作出通径图 By2=-27.1288 4、计算x对y的直接作用及间接作用。间接作用依下式计算 ,i≠j)(2-16) 如x1通过x2对y的间接作用为13                 − − − − − − − − − − = 0.7910 0.054070 0.17079 0.445702 0.374319 0.2287 0.100081 0.342735 0.947696 0.445702 0.9312 0.038215 0.132867 0.342735 0.175079 0.9944 0.011169 0.038215 0.100081 0.054070 1 0.9944 0.9312 0.2287 0.7910 (1) R 对 x2 的消去变换 L=1，K=2                 − − − − − − − − = 5.604968 4.841078 0.009923 0.0387799 0.1125619 8.681726 8.960605 0.000305 0.05091 0.038798 2.471164 3.421524 0.002113 0.000305 0.009923 89.032143 89.53353 3.421524 8.960605 4.841078 89.53353 89.032143 2.471164 8.681726 5.604968 (2) R 对 x3 的消去变换 L=2，K=3                 − − − − − − − − − − = 17.209967 20.90913 4.696167 0.037366 0.0659618 8.325026 8.466727 0.144345 0.050866 0.037366 1169.50497 1619.73071 473.260777 0.144345 4.696167 4090.5215 5629.90709 1619.273071 8.466727 20.90913 2979.57196 4090.5215 1169.50497 8.325026 17.209967 (3) R 对 x4 的消去变换 L=3，K=4                 − − − − − − − − − − = 23.324504 27.128761 4.5901316 0.7345968 0.0385129 163.66583 166.4516 2.83775 19.659498 0.7345968 1145.880627 1595.24661 473.6703827 2.83775 4.5901316 5476.23538 5631.48099 1595.24661 166.4516 27.128761 4342.0943 5476.23538 1145.880627 163.66583 23.325504 (4) R 解得： Py.1=23.3255， Py.2= -27.1288， Py.3=4.5902 ，Py.4=0.7346 3、作出通径图 x1 Py.1=23.3255 Py.2= -27.1288 x2 y Py.3=4.5902 Py.4=0.7346 x3 x4 e 4、计算 xi 对 y 的直接作用及间接作用。间接作用依下式计算： Pi→j→y=rijPyj （i,j=1，2，…m，i≠j） （2-16） 如 x1 通过 x2 对 y 的间接作用为：