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Full Discussion: Need help to delete special characters exists only at the end of the each record in UNIX file?
Top Forums UNIX for Advanced & Expert Users Need help to delete special characters exists only at the end of the each record in UNIX file? Post 303029642 by RudiC on Wednesday 30th of January 2019 03:17:55 AM
Old 01-30-2019
Quote:
Originally Posted by rakeshp
...
output
aa|bb|##$$abch^^$$|xy ^M
...
Sure that output is what you're after (with the ^M)?


Quote:
This code is working fine but it is removing space at the end of the record before the ^M, but i do not want that space to be removed
Difficult to believe. The code removes ONE single non-alphanumeric character at EOL. ^M if it is there, space if it is not.
Include "space" in the set to be excluded, or try

Code:
awk 'BEGIN {FS="|"; OFS="|"} {sub("[[:cntrl:]]$", ""); gsub("[^[:alnum:]]", "", $15)} 1' file

Last edited by RudiC; 01-30-2019 at 04:32 AM..
 

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LEARN ABOUT MINIX

ppmtopgm

ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and  pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

                                                                   10 April 2000                                                       ppmtopgm(1)
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