08-28-2009
Okay, I have one more problem to solve with Awk (or any other simple method in UNIX) :
I have to remove some lines in the data. The original data have the following shape :
Quote:
data file
1
1.23 2.33 1.34
1.33 2.67 4.65
3.56 3.78 1.34
END
2 <-- to be removed
4.67 3.78 6.78 <-- to be removed
6.21 5.55 4.90
3.45 2.57 2.78
3.67 3.71 6.78
END
3 <-- to be removed
3.56 4.89 3.45 <-- to be removed
2.31 6.67 8.90
...
The two first lines after "END" should be removed. How can I do that ? Any idea ?
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LEARN ABOUT SUNOS
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)