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Full Discussion: file formatting ?
Top Forums Shell Programming and Scripting file formatting ? Post 78197 by futurelet on Sunday 17th of July 2005 05:32:36 AM
Old 07-17-2005
Quote:
Originally Posted by sergiking
new column begins when third elemnt is " ".....
can anyone help me????
thank you all.....
Code:
3==NF { i++; j = 1 }
{ if (j>maxj) maxj=j
  a[i,j++] = $0
}
END {
  for (j=1; j<=maxj; j++)
  { s = ""
    for (i=1; (i,1) in a; i++)
      s = s sprintf("%-13s", a[i,j])
    sub(/ +$/,"",s)
    print s
  }
}

 

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LEARN ABOUT ULTRIX

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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