如何删除图案之间的线条但保留带有第二个图案的线条 [英] How to delete lines between the pattern but keep the line with the second pattern

问题描述

我想删除两个图案之间的线条，但保留第二个图案中的线条.例如对于使用 MATER/4401001 302 和 / 作为模式的文件:

I would like to delete the lines between two patterns but keep the line from the second pattern. For example for the file using MATER / 4401001 302 and / as a pattern:

$#         IDMAT   MATYP             RHO   ISINT    ISHG  ISTRAT   IFROZ
MATER /  4401001     302                       0       0       0        
$# BLANK                                                     QVM           IDMPD
                                                                               0
$#                                                                         TITLE
NAME PLINK Material                                                             
$#  SLFACM     FSNVL    DELTNL     STNOR     STTAN     IFLGC     BLANK    TLSTIF
       0.1                                                 0                    
$#   I3DOF    TOLCOR     IDRUP
         0        1.         0




$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
$#         IDMAT   MATYP             RHO   ISINT    ISHG  ISTRAT   IFROZ
MATER /  4401005     103        2.753E-6       0       4                

我想得到:

$#         IDMAT   MATYP             RHO   ISINT    ISHG  ISTRAT   IFROZ
MATER /  4401005     103        2.753E-6       0       4                

我尝试使用以下代码来做到这一点:

I tried to do it using the following piece of code:

awk 'BEGIN{p=1} /MATER \/  4401001/ {p=0} /\// {p=1} p' llink1.inc > llink2.inc 

但它在我的 CentOS 上不起作用 - 两个文件 llink1.inc 和 llink2.inc 是相同的.

But it doesn't work on my CentOS - the both files llink1.inc and llink2.inc are identical.

你能帮忙吗?谢谢

推荐答案

如果 awk 是可能的，这可以是一种方式:

If awk is possible, this can be a way:

$ awk 'BEGIN{p=1} /line 1/ {p=0} /line 2/ {p=1} p' file
bla bla
line 2 
bla bla 
bla bla

这是使用p打印标志的问题，在找到line 1时取消设置并在line 2出现时重新设置.

It is a matter of using the p print flag, unsetting it when line 1 is found and setting it again when line 2 appears.

为了确保我们打印的行是正确的，请说:

To make sure the lines we are printing are the correct ones, say:

$ cat a
1bla bla
line 1
2bla bla  
3gov gov 
line 2 
4bla bla 
5bla bla

$ awk 'BEGIN{p=1} /line 1/ {p=0} /line 2/ {p=1} p' a
1bla bla
line 2 
4bla bla 
5bla bla

<小时>

鉴于您的新样本输入，这对我有用:

---

Given your new sample input, this works to me:

$ awk 'BEGIN{p=1} /MATER \/  4401001/ {p=0; next} /\// {p=1} p' file
$#         IDMAT   MATYP             RHO   ISINT    ISHG  ISTRAT   IFROZ
MATER /  4401005     103        2.753E-6       0       4

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