bash - 每场比赛后追加计数

Question

样本输入：

>Sample GJVT7LS03DEUKL
AAACTCCGCAATGCGCGCAAGC
>Sample GJVT7LS03CXJ53
AAACTCCGCAATGCGCGCAAGCGTGACGGGG
>Sample GJVT7LS03DJOYJ
AAACTCC
>Sample GJVT7LS03DMERH
AAACTCCGCAATGCGCGCAAGCGTGACGGGGGGAC
>Sample GJVT7LS03DN2RB
AAACTCCGCAATGCGCGCAAGCGTGACGG

我想要的：

>Sample_1 GJVT7LS03DEUKL
AAACTCCGCAATGCGCGCAAGC
>Sample_2 GJVT7LS03CXJ53
AAACTCCGCAATGCGCGCAAGCGTGACGGGG
>Sample_3 GJVT7LS03DJOYJ
AAACTCC
>Sample_4 GJVT7LS03DMERH
AAACTCCGCAATGCGCGCAAGCGTGACGGGGGGAC
>Sample_5 GJVT7LS03DN2RB
AAACTCCGCAATGCGCGCAAGCGTGACGG

换句话说，我想为与模式匹配的每一行（在本例中为“Sample”）附加计数（以“_”开头）。任何 sed/awk/等。这项任务的单线？

Answer 1

单程：

$ awk '/^>/{$1=$1"_"++i}1' file
>Sample_1 GJVT7LS03DEUKL
AAACTCCGCAATGCGCGCAAGC
>Sample_2 GJVT7LS03CXJ53
AAACTCCGCAATGCGCGCAAGCGTGACGGGG
>Sample_3 GJVT7LS03DJOYJ
AAACTCC
>Sample_4 GJVT7LS03DMERH
AAACTCCGCAATGCGCGCAAGCGTGACGGGGGGAC
>Sample_5 GJVT7LS03DN2RB
AAACTCCGCAATGCGCGCAAGCGTGACGG

Answer 2

一种可能的尝试如下：

$ awk 'BEGIN{a=1}/Sample/ {$1=$1"_"a; a++}1' file
>Sample_1 GJVT7LS03DEUKL
AAACTCCGCAATGCGCGCAAGC
>Sample_2 GJVT7LS03CXJ53
AAACTCCGCAATGCGCGCAAGCGTGACGGGG
>Sample_3 GJVT7LS03DJOYJ
AAACTCC
>Sample_4 GJVT7LS03DMERH
AAACTCCGCAATGCGCGCAAGCGTGACGGGGGGAC
>Sample_5 GJVT7LS03DN2RB
AAACTCCGCAATGCGCGCAAGCGTGACGG

对于每个包含“Sample”的文件，我们将第一个字段更新为"_"$variable. 该变量a最初设置为 1，然后我们将其加一。