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Full Discussion: Reporting characters after string
Top Forums UNIX for Dummies Questions & Answers Reporting characters after string Post 302970802 by Scrutinizer on Monday 11th of April 2016 11:39:02 PM
Old 04-12-2016
10 occurrences per line ? Or per file?
What is you expected output?

Could you repeat the results with mawk, do you know how to install it?


--
Your GNU sed script will only find one occurrence per line and one occurrence per set of files of regular and reversed/complemented versions (the latter because only part of the file is reversed). Any additional patterns will not be shown and neither will it be shown which files or records these belong to, is that as intended? In the sample in post #1 one it printed the filename and could take multiple files...

Since it only reverse part of the file(s) and searches the whole file(s) there is a risk that it will find a reversed match in a non-reversed part of the file, which would mean a false positive .
To counteract that, you would need something like this, using GNU sed:
Code:
sed -n '0,/AATTCCGG/s/^[ATCG]*AATTCCGG\(.\)\(.\)\(.\)\(.\)[ATCG]*$/\1\2\3\4/p; 0,/CCGGAATT/{y/ATCG/TAGC/; s/^[ATCG]*\(.\)\(.\)\(.\)\(.\)GGCCTTAA[ATCG]*$/\4\3\2\1/p;}' file*

So the sed script it looking for very different things than the awk script us, and is only suited to investigate of there is one occurrence of either pattern in a single (set of) files, and for multiple files you would need a shell loop, which would significantly slow down processing, whereas the awk version can scan multiple files at once.
Last edited by Scrutinizer; 04-12-2016 at 01:31 AM..
 

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LEARN ABOUT DEBIAN

qrencode

QRENCODE(1)						      General Commands Manual						       QRENCODE(1)

NAME

       qrencode - Encode input data in a QR Code and save as a PNG or EPS image.

SYNOPSIS

       qrencode [OPTION]...  [STRING]

DESCRIPTION

       Libqrencode  is	a  library  for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a
       mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.

       Qrencode is a utility software using libqrencode to encode string data in a QR Code and save as a PNG or EPS image.

OPTIONS

       -h, --help
	      display help message.

       -o FILENAME, --output=FILENAME
	      write image to FILENAME. If '-' is specified, the result will be output to standard output. If -S is given, structured  symbols  are
	      written to FILENAME-01.png, FILENAME-02.png, ... (suffix is removed from FILENAME, if specified)

       -s NUMBER, --size=NUMBER
	      specify the size of dot (pixel). (default=3)

       -l {LMQH}, --level={LMQH}
	      specify error collectin level from L (lowest) to H (highest). (default=L)

       -v NUMBER, --symversion=NUMBER
	      specify the version of the symbol. (default=auto)

       -m NUMBER, --margin=NUMBER
	      specify the width of margin. (default=4)

       -d NUMBER, --dpi=NUMBER
	      specify the DPI of the generated PNG. (default=72)

       -t {PNG,EPS,ANSI,ANSI256}, --type={PNG,EPS,ANSI,ANSI256}
	      specify the type of the generated image. (default=PNG)

       -S, --structured
	      make structured symbols. Version must be specified.

       -k, --kanji
	      assume that the input text contains kanji (shift-jis).

       -c, --casesensitive
	      encode lower-case alphabet characters in 8-bit mode. (default)

       -i, --ignorecase
	      ignore case distinctions and use only upper-case characters.

       -8, --8bit
	      encode entire data in 8-bit mode. -k, -c and -i will be ignored.

       -M, --micro
	      encode in a Micro QR Code. (experimental)

       -V, --version
	      display the version number and copyrights of the qrencode.

       [STRING]
	      input data. If it is not specified, data will be taken from standard input.

EXAMPLES

       qrencode -l L -v 1 -o output.png 'Hello, world!'
	      encode into a symbol version 1, level L.

       qrencode -iSv 1 --output=output.png
	      read standard input and encode it into a structured-appended symbols in case-insensitive mode.

AUTHOR

       Written by Kentaro Fukuchi.

RESOURCES

       Main Web Site: http://fukuchi.org/works/qrencode/

       Source code repository: https://github.com/fukuchi/libqrencode/

COPYRIGHT

       Copyright (C) 2006-2012 Kentaro Fukuchi.

qrencode 3.3.0							   Feb. 29, 2012						       QRENCODE(1)
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