Using SED to get n chars after given value from file Post: 302152237

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Extracting the last 3 chars from a string using sed

Hi. Can I extract the last 3 characters from a given string using sed ? Why the following doesn't work (it prints the full string) : echo "abcd" | sed '/\.\.\.$/p' doesn't work ? output: abcd Thanks in advance, 435 Gavea.

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I know this has been asked previously on this forum...But I think I have a different scenario to present. I ahve a file tht looks like this (note:there are control Z and other chars tht are not visible on line with anme bowers) BB7118450 6004718 BIANCALANA =HEI BZ5842819 ...

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gdcmdiff

gdcmdiff(1)							       GDCM							       gdcmdiff(1)

NAME

       gdcmdiff - .SH "SYNOPSIS"

       gdcmdiff [options] file1 file2

DESCRIPTION

       The gdcmdiff command line program takes as input two DICOM file: file1 and file2.

PARAMETERS

       file1   DICOM input filename

       file2  DICOM output filename

options
   options
	 -m	 --meta 	 Compare metainformation. Default is off.
	 -t <n>  --truncate <n>  String values trimmed to n characters.

   general options
	 -h   --help
		print this help text and exit

	 -v   --version
		print version information and exit

	 -V   --verbose
		verbose mode (warning+error).

	 -W   --warning
		warning mode, print warning information

	 -E   --error
		error mode, print error information

	 -D   --debug
		debug mode, print debug information

Simple usage
       gdcmdiff is a great tool to diff DICOM files. Usage is simply:

       $ gdcmdiff input1.dcm input2.dcm

SEE ALSO

       gdcmdump(1), gdcminfo(1)

COPYRIGHT

       Copyright (c) 2006-2011 Mathieu Malaterre

Version 2.2.0							  Tue Feb 5 2013						       gdcmdiff(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Extracting the last 3 chars from a string using sed

Discussion started by: 435 Gavea

2. Shell Programming and Scripting

Replace Junk chars (Sed)

Discussion started by: alfredo123

3. Shell Programming and Scripting

sed to extract first two uppercase chars in targeted lines

Discussion started by: str8danked

4. Shell Programming and Scripting

sed - how to insert chars into a line

Discussion started by: tangentviper