主页 / unix / 问题 / 526542
Accepted
Gonzalo Ponce
Asked: 2019-06-24 18:18:30 +0800 CST

加入命令未按预期工作

  • 772

我正在尝试加入两个具有不同行但有一个共同元素的文件。

文件1：

1/temperature
2/rainfall
3/snowfall
4/windspeed
5/winddirection

文件2：

2008-10-01/1/68
2008-10-02/2/6
2008-10-03/3/4
2008-10-04/4/25
2008-10-05/5/120
2008-10-01/1/89
2008-10-01/4/35
2008-11-01/5/360
2008-10-01/1/45
2008-12-01/1/61
2008-10-10/1/32

我正在尝试使用以下命令加入这两个文件

join -t/ -1 1 -2 2 FILE1 FILE2

我期望以下输出：

1/temperature/2008-10-01/68
1/temperature/2008-10-01/89
1/temperature/2008-10-01/45
1/temperature/2008-12-01/61
1/temperature/2008-10-10/32
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
4/windspeed/2008-10-01/35
5/winddirection/2008-10-05/120
5/winddirection/2008-11-01/360

但我以这种方式拥有前 5 行：

1/temperature/2008-10-01/68
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
5/winddirection/2008-10-05/120

请你帮忙我做错了什么

join

1 个回答

  1. Best Answer

    join期望对其输入进行排序（在要连接的字段上）。在这种情况下（利用 bash shell 的进程替换）：

    $ join -t/ -1 1 -2 2 FILE1 <(sort -t/ -k2 FILE2)
1/temperature/2008-10-10/32
1/temperature/2008-10-01/45
1/temperature/2008-12-01/61
1/temperature/2008-10-01/68
1/temperature/2008-10-01/89
2/rainfall/2008-10-02/6
3/snowfall/2008-10-03/4
4/windspeed/2008-10-04/25
4/windspeed/2008-10-01/35
5/winddirection/2008-10-05/120
5/winddirection/2008-11-01/360

    请注意，所需的排序是词法而不是数字 - 如果第一列的值FILE1超过 9，那么您可能还需要对其进行预排序。

    • 1

相关问题