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Full Discussion: Multiplication of a column from 2 files using awk
Top Forums Shell Programming and Scripting Multiplication of a column from 2 files using awk Post 302843561 by Don Cragun on Tuesday 13th of August 2013 11:19:24 PM
Old 08-14-2013
The for i in {1..3} works in some shells, but not others. Since the first line of your script doesn't specify what shell you want, it will run using your system's default shell. Then $i in your awk command will not be an expansion of your shell variable; it will reference $0 (the entire input line) since the variable i in your awk script is undefined.
You could try something like:
Code:
awk '
FNR == NR {
        f1[++fc1] = $1
        next
}
{       fn = sprintf("out%d.txt", FNR)
        for(i = 1; i <= fc1; i++) printf("%d\n", $1 * f1[i]) > fn
        close(fn)
}' file1.txt file2.txt

If you want to try this on a Solaris/SunOS system, use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk.

Note that this script call awk once (no matter how many lines are in file2.txt) rather than calling awk twice and paste once for each line in file2.txt.
This User Gave Thanks to Don Cragun For This Post:
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LEARN ABOUT SUSE

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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