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Full Discussion: Check multiple patterns in awk
Top Forums Shell Programming and Scripting Check multiple patterns in awk Post 302957694 by RavinderSingh13 on Wednesday 14th of October 2015 05:03:13 AM
Old 10-14-2015
Hello kannan13,

Welcome to forums hope you will enjoy learning here. Please use code tags as per forum rules for Inputs/codes/commands which you are using into your post as per forum rules. Now coming to your post, $a will denote value of a variable but in awk it wouldn't work like that way, there is NO need of $ sign to get the value of variables here. An example for this is as follows.
Code:
awk -vvariable=10 'BEGIN{print variable}'

Output will be as follows.
Code:
10

Now for your requirement as far as I understood your requirement, you have 2 variables named a and b and if there value is present in file(Taking your sample file only, because if file has multiple lines then we need to be more specific about your requirement as you need to tell us either you need to check variable in whole file or line by line is fine.) and their own values are equal then print value 0 in output.
Code:
awk -va=1 -vb=1  '{for(i=1;i<=NF;i++){e=a==$i?q++:q;e=b==$i?q++:q;};}{if(e==2 && a==b){print 0}}'  Input_file

Because I have taken an example where values or variable a and b are same it will show output as follows.
Code:
0

If you have any doubts or your requirement is not meeting this solution, I would suggest you to show your sample input with all conditions with their expected output and your O.S details too, hope this helps you.


Thanks,
R. Singh
 

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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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