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Full Discussion: awk copy first column in new lines
Top Forums Shell Programming and Scripting awk copy first column in new lines Post 303012444 by Don Cragun on Sunday 4th of February 2018 06:26:19 PM
Old 02-04-2018
First let us start with the standard questions that should be answered in your first post in any technical thread:
  1. What operating system are you using?
  2. What shell are you using?
  3. What have you tried to solve this problem on your own?
Then we can move on to details specific to this thread:
  1. Numbers do not contain underscore characters. Why do you call 001_1_174 a number?
  2. What criteria are to be used to decide if the first column in an input line is numeric?
  3. Is the criteria that the second field on a line is the string "j"?
  4. Can your numbers have leading plus or minus signs?
  5. Can your numbers have decimal points? If so, what is your decimal point character?
  6. Can your numbers have thousands separators?
  7. Can your numbers have a leading or trailing currency symbol?
  8. Where is this table that you have?
  9. What is the format of this table?
If you want us to do your work for you, you can at least give us the details needed to figure out what must be done. Note that we are here to help you learn how to write your own code. We are not here to act as your unpaid programming staff.
 

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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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