怎么根据一个文件输出另一个文件中的对应行及其下一行

elaine2017

现有1.txt，内容如下：
>E8_G9_L007_R1.2
>E8_G9_L007_R1.3
>E8_G9_L007_R1.4
>E8_G9_L007_R1.5
>E8_G9_L007_R1.12
>E8_G9_L007_R1.14
>E8_G9_L007_R1.16
>E8_G9_L007_R1.17


2.txt，其内容如下：
>E8_G9_L007_R1.1
GCAGTCCACTTCGATTTAATTCGTAAACAAGCAGTAGTAATTCCTGCTTTATCAAGATAATTTTTCGACTCATCAGAAATATCCGAAAGTGTTAACTTCTGCGTCATGGAAGCGATAAAACTCTGCAGGTTGGATACGCCAATCATTTTTA
>E8_G9_L007_R1.2
CAACAACATGCAGCAGTGATGGCGCCAGGCTCTGCAGGGTGGGCCTGATCCCAGAGTGGTGCTTACTGTGCTGACTGTGTACTTATCTTCCCCAAGAGAAAATGCTTCTTTTGAGCACACTGTACCTACCATCTGCATTGAGCAGAAAGAC
>E8_G9_L007_R1.3
GCGAAGCTCTTACTAATACAGGTTCTCTCTCTTGGTACTGTGTAACTTCCAATGAGAATTCAGACTGTTGTACCAATGAAATGGATTGGCTCTGTAGAACTGGCTTAGAAAATTTATAGTGAGATGAAAAAGATCTAGGGAGTAGCTTCCT
>E8_G9_L007_R1.4
GCAGGAGCCACAGGTGGCGCAGTCCAGGACGATGTTGCACAGCGTCAGGAACTCGCAGAACAGGCAGGACAGGATGCAGTGGACACAGCAGTCTGCGGGGTGGCGGTGGAGAGGGGGACGGGTGAGAGAGGGGAGGGATGAGCATGTGTGA
>E8_G9_L007_R1.5
CCTTGCCTGCTCCCTTCTTCAAGCAGACAACTACTCCCGCCACTGCTCCCACCACAACTGCCCCGCTCTTCACTGGCCTGGCCAGCGCCACCTCTGCTGTGGCTCCCATCACCTCTGCCAGTCCATCCACAGACTCTGCTTCGAAGCCTGC
>E8_G9_L007_R1.6
CCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCA
>E8_G9_L007_R1.7
CCTTTTGCTCACATGTTCTTTCCTGCGTTATCCCCTGATTCTGTGGATAACCGTATTACCGCCTTTGAGTGAGCTGATACCGCTCGCCGCAGCCGAACGACCGAGCGCAGCGAGTCAGTGAGCGAGGAAGCGGAAGAGCGCCCAATACGCA



其中，上面例子中的2.txt是14行，现在想找出在2.txt中的1.txt的对应行及下一行，如上面的结果应该是：
>E8_G9_L007_R1.2
CAACAACATGCAGCAGTGATGGCGCCAGGCTCTGCAGGGTGGGCCTGATCCCAGAGTGGTGCTTACTGTGCTGACTGTGTACTTATCTTCCCCAAGAGAAAATGCTTCTTTTGAGCACACTGTACCTACCATCTGCATTGAGCAGAAAGAC
>E8_G9_L007_R1.3
GCGAAGCTCTTACTAATACAGGTTCTCTCTCTTGGTACTGTGTAACTTCCAATGAGAATTCAGACTGTTGTACCAATGAAATGGATTGGCTCTGTAGAACTGGCTTAGAAAATTTATAGTGAGATGAAAAAGATCTAGGGAGTAGCTTCCT
>E8_G9_L007_R1.4
GCAGGAGCCACAGGTGGCGCAGTCCAGGACGATGTTGCACAGCGTCAGGAACTCGCAGAACAGGCAGGACAGGATGCAGTGGACACAGCAGTCTGCGGGGTGGCGGTGGAGAGGGGGACGGGTGAGAGAGGGGAGGGATGAGCATGTGTGA
>E8_G9_L007_R1.5
CCTTGCCTGCTCCCTTCTTCAAGCAGACAACTACTCCCGCCACTGCTCCCACCACAACTGCCCCGCTCTTCACTGGCCTGGCCAGCGCCACCTCTGCTGTGGCTCCCATCACCTCTGCCAGTCCATCCACAGACTCTGCTTCGAAGCCTGC


请问这个该怎么写？

christmas1102

1. awk -vRS=">" 'NR==FNR&&NR>1{a[$1]=$1;next}NR>1{b[$1]=$2}END{for(i in b)if(a[i])print RS i"\n"b[i]}' 1.txt 2.txt

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看上去挺笨拙的，没办法先这样吧，等高人来解

1cpuer

# [ /home/soio/1bs/awks ] {2018-06-03 12:44:34}
: 1528001074:0;➜  awk 'FNR==NR{a[$1]=$2" "$3;next}NR>=1{$2=a[$0];print }' <(sed '/[0-9]$/N;s/\n/ @--# /g' 1.0ed) <(sed '' 2.0ed) | grep '@--# ' | sed 's/[ ]@--# /\n&/g; s/[ ]@--# //g'
>E8_G9_L007_R1.2
b
>E8_G9_L007_R1.3
c
>E8_G9_L007_R1.4
d
>E8_G9_L007_R1.5
e


# [ /home/soio/1bs/awks ] {2018-06-03 12:44:56}
: 1528001096:0;➜  cat 1.0ed && echo 'xx--xx' && cat 2.0ed
>E8_G9_L007_R1.1
a
>E8_G9_L007_R1.2
b
>E8_G9_L007_R1.3
c
>E8_G9_L007_R1.4
d
>E8_G9_L007_R1.5
e
>E8_G9_L007_R1.6
e
>E8_G9_L007_R1.7
f
xx--xx
>E8_G9_L007_R1.2
>E8_G9_L007_R1.3
>E8_G9_L007_R1.4
>E8_G9_L007_R1.5
>E8_G9_L007_R1.12
>E8_G9_L007_R1.14
>E8_G9_L007_R1.16
>E8_G9_L007_R1.17

wh7211

回复 1# elaine2017

1. awk 'FILENAME==ARGV[1]{a[$0]++;next}{if(a[$0]){b=1;c=$0}else{if(b){print c"\n"$0};b=""}}' 1.txt 2.txt

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龙牙地主天

回复 1# elaine2017

1. awk 'NR==FNR{a[$1]++;next}{if(a[$1]) p=NR}NR==p || NR==p+1' 1.txt 2.txt

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christmas1102

1. awk 'NR==FNR{a[$1]=$0;next}{if(a[$1]){getline b;print a[$1]"\n"b}}' 1.txt 2.txt

复制代码

christmas1102

1. awk 'NR==FNR{a[$1]=$0;next}{if(a[$1]){getline b;print a[$1]"\n"b}}' 1.txt 2.txt

复制代码