通过UNIX中的单个列合并两个文件 [英] Merging two files by a single column in unix

问题描述

我想在UNIX中按一列合并两个文件.

I would like to merge two files by one column in unix.

我有file_a:

subjectid name age  
12 Jane 16  
24 Kristen 90  
15 Clarke 78  
23 Joann 31  

我还有另一个file_b:

I have another file_b:

subjectid prob_disease  
12 0.009  
24 0.738  
15 0.392  
23 1.2E-5  

我想在命令行中合并这些文件.我想按主题合并文件a和b.由于每个文件的长度约为200万行，因此我在R中进行了尝试，但由于数据量而冻结，有人可以帮助我在Linux中进行此操作吗? 所需的输出:

I would like to merge these files in the command line. I'd like to merge files a and b by subjectid. Since each file is about 2 million lines long, I tried in R but it froze due to the amount of data, could someone please help me do this in linux? Desired output:

subjectid prob_disease name age  
12 0.009 Jane 16  
24 0.738 Kristen 90   
15 0.392 Clarke 78  
23 1.2E-5 Joanna 31     

请帮忙，谢谢！

推荐答案

签出 join(1) .就您而言，您甚至不需要任何标志:

Check out join(1). In your case, you don't even need any flags:

$ join file_b file_a
subjectid prob_disease name age
12 0.009 Jane 16
24 0.738 Kristen 90
15 0.392 Clarke 78
23 1.2E-5 Joann 31

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