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07-04-2007
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Splitting a line
I have a series of .txt files, that contain lines of text separated by the following string ====================
In some of the .txt files, the string ends with the word Document, leaving the string ==================Document. I would like to be able to split any such line and move the word "Document" to the next line, appending it to the beginning of the next line. Any suggestions? 
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07-04-2007
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Hi.
Here is one solution: Code:
#!/bin/sh
# @(#) s1 Demonstrate sed line split.
set -o nounset
echo " sh version: $BASH_VERSION" >&2
sed --version | head -1
FILE=${1-data1}
echo
echo " Input file:"
nl $FILE
echo
echo " Output"
sed 's/^\(.*====\)\(Document.*\)$/\1\n\2/' $FILE
exit 0
Code:
% ./s1
sh version: 2.05b.0(1)-release
GNU sed version 4.1.2
Input file:
1 Beginning.
2 This is a test set of data.
3 ==============
4 this is ok.
5 ==============
6 this is ok, too.
7 =============Document
8 this we want changed.
9 =============
10 this is ok again.
11 End
Output
Beginning.
This is a test set of data.
==============
this is ok.
==============
this is ok, too.
=============
Document
this we want changed.
=============
this is ok again.
End
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07-04-2007
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If you really want to prepend Document to the beginning of the following line, e.g
Code:
======Document foo Code:
====== Documentfoo Code:
#!/bin/bash
vi <<-EOF >/dev/null 2>&1
:r splitme.txt
:%s/^\(=*\)\(Document\)\n\(.*\)$/\1\r\2\3/g
:%s/^\(=*\)\(Document\)$/\1\r\2/g
:w! splitme.new
:q
EOF
exit 0
ZB
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07-04-2007
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Hi.
Thanks to ZB for pointing out the part I apparently skipped over. If that is desired, then the sed becomes slightly more complex (or mysterious), and it is easier to build it into a separate sed script file: % cat s3 Code:
#!/bin/sh
# @(#) s3 Demonstrate sed line split and merge.
set -o nounset
echo " sh version: $BASH_VERSION" >&2
sed --version | head -1
FILE=${1-data1}
echo
echo " Input file:"
nl $FILE
cat >script <<'EOF'
/==Document$/{
N
s/==Document\n/==\nDocument/
}
EOF
echo
echo " Output"
sed -f script $FILE |
nl
exit 0
Code:
% ./s3
sh version: 2.05b.0(1)-release
GNU sed version 4.1.2
Input file:
1 Beginning.
2 This is a test set of data.
3 ==============
4 this is ok.
5 ==============
6 this is ok, too.
7 =============Document
8 this we want changed.
9 =============
10 this is ok again.
11 End
Output
1 Beginning.
2 This is a test set of data.
3 ==============
4 this is ok.
5 ==============
6 this is ok, too.
7 =============
8 Documentthis we want changed.
9 =============
10 this is ok again.
11 End
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07-05-2007
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Thanks, I'm trying this, but I'm getting the error message
nl: data1: No such file or directory Simon
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07-05-2007
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And I'm fooling around with the sed string outside of the script, and it's not actually working, period.
s/==Document\n/==\nDocument/
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07-05-2007
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Hi, Simon.
Quote:
Code:
Beginning. This is a test set of data. ============== this is ok. ============== this is ok, too. =============Document this we want changed. ============= this is ok again. End Last edited by drl; 07-05-2007 at 01:53 PM.
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