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Top Forums Shell Programming and Scripting calculating row-wise standard deviation using awk Post 302666009 by Corona688 on Tuesday 3rd of July 2012 01:57:00 PM
Old 07-03-2012
Are you sure your output there is right? I get your numbers for the first, but your second appears to have an extra zero in the middle.

Code:
awk '{ A=0; V=0; for(N=1; N<=NF; N++) A+=$N ; A/=NF ; for(N=1; N<=NF; N++) V+=(($N-A)*($N-A))/(NF-1); print sqrt(V) }' <<EOF
> 23 35 12 25 16 17 18 19 29 12
> 12 26 15 14 15 23 12 12 15 14
> EOF
7.4117
4.80278

$

This User Gave Thanks to Corona688 For This Post:
 

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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). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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