请高手指点一下,其中x是日频率,y1-y3都是收盘价,我这个程序有错误吗?错在哪里要怎么修改?非常感激好心人
data tj.logitex2;
input x y1 y2 y3;
cards;
28.21801314 1464.774 5417.017 3641.541
22.03324314 1539.828 5479.864 3641.059
11.98299188 1523.387 5488.242 3643.79
15.84847313 1541.887 5444.037 3559.259
7.34441438 1553.239 5409.058 3546.723
9.663703131 1586.124 5332.221 3513.576
13.91573251 1601.168 5405.091 3514.04
6.957866254 1588.007 5379.738 3502.423
8.504058755 1586.335 5449.038 3604.121
16.62156939 1639.555 5520.123 3635.146
8.504058755 1630.065 5281.895 3355.155
32.8438949 1700.852 5472.514 3396.222
20.83333333 1722.581 5611.694 3548.885
25.40415704 1744.037 5690.156 3567.613
;
run;
proc logistic data=tj.logitex2
nodel x=y1 y2 y3/selection=stepwise;
run;