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Top Forums Shell Programming and Scripting use awk to replace empty fields with the latest nonempty field Post 302365510 by grossgermany on Tuesday 27th of October 2009 09:11:35 AM
Old 10-27-2009
use awk to replace empty fields with the latest nonempty field

Hi suppose I have a csv file like this

Code:
count,1977,1978,1979
usa,         ,       , blue
japan,   red, yellow,green
india,        ,  yellow,blue
china,   blue, yellow, green

I want the output to be(replace everything, including empty data, with the most recent data):

Code:
count,1977,1978,1979
usa,     blue, blue, blue
japan,   green, green,green
india,    blue,  blue,blue
china,   green, green, green

how to do this in awk? thanks.

Last edited by Franklin52; 10-27-2009 at 10:20 AM.. Reason: Please use code tags!
 

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ppmdither(1)						      General Commands Manual						      ppmdither(1)

NAME
ppmdither - ordered dither for color images SYNOPSIS
ppmdither [-dim power] [-red shades] [-green shades] [-blue shades] [ppmfile] DESCRIPTION
Reads a portable pixmap as input, and applies dithering to it to reduce the number of colors used down to the specified number of shades for each primary. The default number of shades is red=5, green=9, blue=5, for a total of 225 colors. To convert the image to a binary rgb format suitable for color printers, use -red 2 -green 2 -blue 2. OPTIONS
-dim power The size of the dithering matrix. The dithering matrix is a square whose dimension is a power of 2. power is that power of 2. The default is 4, for a 16 by 16 matrix. -red shades The number of red shades to be used, including black; minimum of 2. -green shades The number of green shades to be used, including black; minimum of 2. -blue shades The number of blue shades to be used, including black; minimum of 2. SEE ALSO
pnmdepth(1), ppmquant(1), ppm(5) AUTHOR
Copyright (C) 1991 by Christos Zoulas. 14 July 1991 ppmdither(1)
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