awk打印列中特定的字符数

Question

我有一个包含许多列和行的文件，我想删除第四列和第五列中多个字符的行。

输入：

--- 22:16050115:G:A 16050115 GGG A
--- 22:16050213:C:T 16050213 C T
--- 22:16050319:C:T 16050319 C T
--- 22:16050527:C:A 16050527 C AAA
--- 22:16050568:C:A 16050568 CC A
--- 22:16050607:G:A 16050607 G A
--- 22:16050627:G:T 16050627 G TGG
--- 22:16050646:G:T 16050646 G T
--- 22:16050655:G:A 16050655 GTAA A
...

期望的输出：

--- 22:16050213:C:T 16050213 C T
--- 22:16050319:C:T 16050319 C T
--- 22:16050607:G:A 16050607 G A
--- 22:16050646:G:T 16050646 G T
...

非常感谢。

Answer 1

awk 'length($4)==1 && length($5)==1' inputfile
--- 22:16050213:C:T 16050213 C T
--- 22:16050319:C:T 16050319 C T
--- 22:16050607:G:A 16050607 G A
--- 22:16050646:G:T 16050646 G T

这将使用$4的{​​{1}}函数检查$5和length()的长度。这是使用比较运算符awk。您可以将其修改为==，<，>等。因此，上面的命令将打印第4和第5列中只有一个字符的行。