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Full Discussion: Search for the two patterns and print everything in between
Top Forums Shell Programming and Scripting Search for the two patterns and print everything in between Post 302590595 by durden_tyler on Tuesday 17th of January 2012 01:34:56 AM
Old 01-17-2012
Using Perl, you could search for all text from "#" to end of line and replace the entire line by the result -

Code:
$
$ cat f31
@HWUSI-EAS1727:19:6:1:3674:984:0:1#GTTAATANTTGGGTTTTCT
@HWUSI-EAS1727:19:6:1:3674:984:0:1#GTTANTTGGGTTTTCT
@HWUSI-EAS1727:19:6:1:3674:984:0:1#CTNTTGGGTTTTCT
$
$
$ perl -lne 's/^.*#(.*)$/$1/ and print' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$

Or you could remove everything up to and including the "#" character from each line -

Code:
$
$ perl -lne 's/^.*#// and print' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$

Or you could split each line on "#" as the delimiter, assign the chunks to an array and print just the 2nd element of the array -

Code:
$
$ perl -lne '@x = split/#/ and print $x[1]' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$
$ # Or more succintly...
$
$ perl -lne 'print ((split/#/)[1])' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$ # Or even more succintly...
$
$ perl -plne '$_=(split/#/)[1]' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$

Or you could even find out the index of the "#" character in each line, extract the substring of each line that starts from that index onwards, and then print that substring, like so -

Code:
$
$
$ perl -lne 'print substr($_,index($_,"#")+1)' f31
GTTAATANTTGGGTTTTCT
GTTANTTGGGTTTTCT
CTNTTGGGTTTTCT
$
$

tyler_durden
This User Gave Thanks to durden_tyler For This Post:
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LEARN ABOUT DEBIAN

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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