Text-Processing

文件中的行範圍

  • January 8, 2021

我有一個包含幾行的文件:

 C   1.31729690416596     -0.05166770188922      0.05026556004853
 C   2.15676687192808     -0.87605403673920      0.93010807487406
 C   1.45516592682388     -0.49804136618225     -1.24011085742027
 C   2.67489108786199     -2.06116694592319      0.09667460087481
 C   2.24626744432148     -1.81826783081380     -1.24626795859707
 C   0.12278380551129     -0.78127661791244     -1.79035714840462
 C   0.11627012096698     -2.05095769577445     -2.31049614254010
 C   1.41908665901196     -2.77247309785857     -1.91624359298119

我需要在一次操作中列印一系列複雜的行,例如第 1 行,多行 4 到 7 行,這是 1,4-7。如何獲取這些行而不是搜尋每行。

ed行編輯器:

printf '%s\n' '1p' {4..7}p 'Q' | ed -s - file

awk:

printf 'NR==%d\n' 1 {4..7} | awk -f - file 

sed流編輯器:

printf '%sp\n' 1 4,7 | sed -nf - file

perl:

perl -lne 'print if grep { $_ == $. } (1, 4..7)' file

使用awkvar NR


awk 'NR == 1 ||  NR >= 4 && NR <= 7' file
 C   1.31729690416596     -0.05166770188922      0.05026556004853
 C   2.67489108786199     -2.06116694592319      0.09667460087481
 C   2.24626744432148     -1.81826783081380     -1.24626795859707
 C   0.12278380551129     -0.78127661791244     -1.79035714840462
 C   0.11627012096698     -2.05095769577445     -2.31049614254010

引用自:https://unix.stackexchange.com/questions/627743