Can sed use a file on the syntax? Post: 302929215

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Top Forums UNIX for Dummies Questions & Answers Can sed use a file on the syntax? Post 302929215 by Don Cragun on Friday 19th of December 2014 12:11:50 AM

12-19-2014

Registered User

Quote:

Originally Posted by lColli

Dear Don Cragun,

Thank you for your help. Sorry, I am using CentOS release 6.6 server and the SHELL is 4.1.2(1)-release.

Code:

 for line in $(cat list.txt)
do
 grep $line code_to_value.txt | cut -c18 > value_1
 grep $line code_to_value.txt | cut -c22 > value_2

 paste -d "" value_1 value_1 > code_1
 paste -d "" value_1 value_2 > code_2
 paste -d "" value_2 value_2 > code_3

grep -n $line table_values.txt | cut -d : -f1 > line

sed "/$(cat line)/ s/1/$(cat code_1)/g" table_values.txt > test_output
done

I am getting this error.

sed: -e expression #1, char 0: no previous regular expression

Here is a better exemple of the data:

Code:

PT_1 1 1 1 1 1 1 2 2 1 1 2 
PT_2 2 2 3 1 2 3 2 2 1 3 1
PT_3 3 2 3 2 3 3 2 1 1 2 3
PT_4 3 2 1 2 3 1 3 2 1 1 2

Thanks very much for your attention!
Leandro

What do you mean, this is a better example of the data? Your script has three input files: list.txt, code_to_value.txt, and table_values.txt. Is this example of the data an example of one of these input files? Is it an example of the output you're trying to produce?

From your sample code, we can see that there are several things that could be made more efficient; but without knowing what you're trying to do, we can easily produce efficient code that doesn't do anything at all like what you want to do. Why do you have a loop, if you only want to keep the output produced by the last time through the loop?

Please help us help you. Show us sample data for each of your three input files. And, given those sample input files, what output are you trying to produce in test.output?

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LEARN ABOUT REDHAT

unix2dos

unix2dos(1)						      General Commands Manual						       unix2dos(1)

NAME

       unix2dos - UNIX to DOS text file format converter

SYNOPSYS

       unix2dos [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents unix2dos, the program that converts text files in UNIX format to DOS format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates unix2dos under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      unix2dos

       Convert and replace a.txt. Convert and replace b.txt.

	      unix2dos a.txt b.txt

	      unix2dos -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.

	      unix2dos a.txt -c iso b.txt

	      unix2dos -c ascii a.txt -c iso b.txt

       Convert and replace a.txt while keeping original date stamp.

	      unix2dos -k a.txt

	      unix2dos -k -o a.txt

       Convert a.txt and write to e.txt.

	      unix2dos -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      unix2dos -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      unix2dos a.txt -n b.txt e.txt

	      unix2dos -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      unix2dos -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHOR

       Benjamin Lin - ( blin@socs.uts.edu.au )

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       dos2unix(1)

1995.03.31							   unix2dos v2.2						       unix2dos(1)