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Full Discussion: Create ranges on a file with awk
Top Forums Shell Programming and Scripting Create ranges on a file with awk Post 302419988 by rany1 on Monday 10th of May 2010 09:07:36 AM
Old 05-10-2010
Create ranges on a file with awk
Hello all,

Let's say we have this file :

Code:
$ cat inputfile
2
3
4
7
8
11
15
16
17

I'm trying to make a script with awk which gives as output the following :

Code:
 
Range1   2    4
Range2   7    8
Range3   11  11
Range4   15  17


Which means for every successive integers, we print only the first & the last of the range and by incrementing the range number.

Could someone help please... I'm trying to do it without success.
I seached on the forum and didn't find something similar.

Thx in advance,
 

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LEARN ABOUT PHP

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-
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       -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
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       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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