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Full Discussion: Find avg using awk
Top Forums Shell Programming and Scripting Find avg using awk Post 302381627 by jp2542a on Saturday 19th of December 2009 07:16:28 AM
Old 12-19-2009
contents of avg.awk

Code:
BEGIN {
        FS=","
}

{
        s = 0
        j = 0
        for (i=4; i <= NF; i +=2)
        if ($i >=5)
        {
                s += $i
                j++
        }
        if ( j == 0)
                next
        a = s / j
        if ( a >= 5 )
                print $2 " avg " a
}

results of execution:

Code:
$ awk -f avg.awk data.txt
Jordan Mary avg 7
Leven Kate avg 6
Owen Chris avg 6.5

 

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LEARN ABOUT DEBIAN

gpiv_t-avg-img

GPIV_T-AVG-IMG(1)					      General Commands Manual						 GPIV_T-AVG-IMG(1)

NAME

       gpiv_t-avg-img - Calculates time-averaged intensities from a series of images at each pixel.

SYNOPSIS

       gpiv_t-avg-img [-c int] [-fb string] [-ff int] [-fl int] [-fx] [-help] [-p | --print] [-r int] [-s] [-v] < stdin > stdout

DESCRIPTION

       gpiv_t-avg-img calculates time-averaged intensities from a series of images for each pixel. This program uses the GENPAR parameters.

Options
       -c NCOLS
	      Number of columns.

       -fb FILE
	      File base-name (without .number.r extension) instead of stdin and stdout.

       -ff N  Number of first image file.

       -fl N  Number of last image file.

       -fx    Prefix numbering to file base name.

       -help | --help
	      On-line help.

       -p | --print
	      Prints parameters, command line options and input and output filenames to stdout.

       -r NROWS
	      Number of rows.

       -s     Subtract mean from input data.  -v | --version Prints version information to standard output, then exits successfully.

       SEE ALSO
	      gpivtools

AUTHOR

       Gerber Van der Graaf

								  19 Januari 2005						 GPIV_T-AVG-IMG(1)
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