x=read.table("shuju3.txt",header=T)
> y=data.frame(x)
> data(y,package="urca")#变成程序包的数据格式


Warning message:
In data(y, package = "urca") : 没有‘y’这个数据集



回车：y
y
      lngdp     lnef     lnep    lnep1
1  3.565694 1.909770 4.603707 4.603707
2  3.612837 2.006081 4.613038 4.613038
3  3.661586 2.097778 4.626966 4.626966
4  3.693358 2.131330 4.640730 4.640730
5  3.730249 2.180040 4.656050 4.656050
6  3.779661 2.233833 4.666855 4.666855
7  3.862042 2.303908 4.683020 4.683020
8  3.958989 2.405363 4.697865 4.697865
9  4.016038 2.484798 4.709965 4.709965
10 4.085455 2.506356 4.722494 4.722494
11 4.181283 2.588249 4.735072 4.735072
12 4.235016 2.653010 4.742953 4.742953
13 4.275839 2.704039 4.811233 4.811233
14 4.342533 2.864214 4.816182 4.816182
15 4.434481 2.938044 4.820543 4.820543
16 4.552342 3.025281 4.824828 4.824828
17 4.686971 3.172831 4.829014 4.829014
18 4.787743 3.273684 4.832924 4.832924
19 4.856207 3.354558 4.838534 4.838534
20 4.901540 3.403417 4.843980 4.843980
21 4.930417 3.469684 4.849032 4.849032
22 4.956958 3.524920 4.853662 4.853662
23 5.001215 3.585357 4.857845 4.857845
24 5.044787 3.666299 4.863472 4.863472
25 5.085353 3.738783 4.867703 4.867703
26 5.138056 3.792971 4.871760 4.871760
27 5.209086 3.859894 4.876218 4.876218
28 5.272582 3.925252 4.879812 4.879812
29 5.341313 3.991904 4.874934 4.874934
30 5.431737 4.084507 4.876916 4.876916
31 5.504492 4.161390 4.878315 4.878315
32 5.542927 4.217555 4.879830 4.879830
33 5.615982 4.291410 4.881755 4.881755
34 5.689576 4.377840 4.883207 4.883207
35 5.732689 4.457205 4.884818 4.884818
36 5.774695 4.482369 4.886361 4.886361
37 5.808868 4.515959 4.887915 4.887915
38 5.836011 4.557857 4.889027 4.889027


想请大家帮忙看看，多谢！