计数文件出现linux

Question

我想计算第3列中每个单词出现的次数.以下是输入

IN A three
US B one
LK C two
US B three
US A one
IN A one
US B three
LK C three
US B two
US A two
IN A two
US B two

输出应如下所示:

IN A three    4
US B one      3
LK C two      5
US B three    4
US A one      3
IN A one      3
US B three    4
LK C three    4
US B two      5
US A two      5
IN A two      5
US B two      5

Answer 1

这可以是一种方式;

$ awk 'FNR==NR{++a[$3]; next} {print $0, a[$3]}' file file
IN A three 4
US B one 3
LK C two 5
US B three 4
US A one 3
IN A one 3
US B three 4
LK C three 4
US B two 5
US A two 5
IN A two 5
US B two 5

说明

它循环遍历文件两次:首先获取数据,然后打印它.

• FNR==NR{++a[$3]; next} 在第一次循环时,记录第3个值出现的次数.
• {print $0, a[$3]} 当第二次循环时,打印该行加上计数器值.

要获得更好的输出,您还可以使用printf在第3列之后打印选项卡:

{printf "%s\t%s\n", $0, a[$3]}