Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: calculating row-wise standard deviation using awk
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:
ida1215
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script for finding standard deviation

I have a CSV file that looks like 0,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0 10,11,7,0,4,12,2,3,7,0,11,3,12,4,0,5,5,4,5,0,8,6,12,0,9,3,3,0,2,7,8 19,11,7,0,4,14,16,10,8,2,13,7,15,6,0,76,6,4,10,0,18,10,17,1,11,3,3,0,9,9,8... (7 Replies)
Discussion started by: RJ17
7 Replies

2. Shell Programming and Scripting

Mean and Standard deviation

Hi all, I am new to shell scripting and wanna calculate the mean and standard deviation using shell programming. I have a file with letters that are repeating and their corresponding duration a 0.32 a 0.89 aa 0.34 aa 0.23 au 0.012 au 0.26... (4 Replies)
Discussion started by: lakshmikanth.pg
4 Replies

3. UNIX for Dummies Questions & Answers

Calculating the Standard Deviation for a column

Hi all, I want to calculate the standard deviation for a column (happens to be column 3). Does any know of simple awk script to do this? Thanks (1 Reply)
Discussion started by: kylle345
1 Replies

4. Shell Programming and Scripting

using awk to print average and standard deviation into a file

Hi I want to use awk to print avg and st deviation but it does not go into a file for column 1 only. I can do average and # of records but i cannot get st deviation. awk '{sum+=$1} END { print "Average = ",sum/NR}' thanks (1 Reply)
Discussion started by: phil_heath
1 Replies

5. Shell Programming and Scripting

awk-gsub on column-wise on each row

awk '{ gsub(/....=/,""); print }' want.dat >final.dat the above awk command which removes all the chars before and including '=' on the entire row. --thats what it meant be.:) but i need to remove text on column-wise on each row. many thanks, EM ---------- Post updated at 10:00 AM... (4 Replies)
Discussion started by: elamurugu
4 Replies

6. Shell Programming and Scripting

Standard deviation in awk

Hi all, I need to find the standard deviation of each column of a dataset below for each hour. The data is given in 5 second intervals as shown below DATE TIME FRAC_DAYS_SINCE_JAN1 FRAC_HRS_SINCE_JAN1 EPOCH_TIME ... (11 Replies)
Discussion started by: gd9629
11 Replies

7. Shell Programming and Scripting

AWK script for standard deviation / root mean square deviation

I have a file with say 50 columns, each containing a whole lot of data. Each column contains data from a separate simulation, but each simulation is related to the data in the last (REFERENCE) column $50 I need to calculate the RMS deviation for each data line, i.e. column 1 relative to... (12 Replies)
Discussion started by: chrisjorg
12 Replies

8. Shell Programming and Scripting

Loop for row-wise averaging of multiple files using awk

Hello all, I need to compute a row-wise average of files with a single column based on the pattern of the filenames. I really appreciate any help on this. it would just be very difficult to do them manually as the rows are mounting to 100,000 lines. the filenames are as below with convention as... (2 Replies)
Discussion started by: ida1215
2 Replies

9. Shell Programming and Scripting

Calculating the epoch time from standard time using awk and calculating the duration

Hi All, I have the following time stamp data in 2 columns Date TimeStamp(also with milliseconds) 05/23/2012 08:30:11.250 05/23/2012 08:30:15.500 05/23/2012 08:31.15.500 . . etc From this data I need the following output. 0.00( row1-row1 in seconds) 04.25( row2-row1 in... (5 Replies)
Discussion started by: ks_reddy
5 Replies

10. Shell Programming and Scripting

Output mean and standard deviation of a row

I have a file that looks that this: 820 890 530 1650 1600 1800 1850 1900 2270 1640 2300 1670 2080 2200 2350 1150 1630 2210 I would like to output the mean and standard deviation of each row so that my final output would look like this 820 890 530 746.667 155.849 1650 1600 1800... (5 Replies)
Discussion started by: kayak
5 Replies

LEARN ABOUT DEBIAN

numaverage

NUMAVERAGE(1)						User Contributed Perl Documentation					     NUMAVERAGE(1)

NAME

       numaverage - Find the average of a set of numbers.

SYNOPSIS

       numaverage [-dhiIlmMV] <FILE>

       | numaverage [-dhiIlmMV]    (Input on STDIN from pipeline.)

       numaverage [-dhiIlmMV]	   (Input on STDIN.  Use Ctrl-D to stop.)

DESCRIPTION

       By default numaverage will determine the average from all numbers on input.  Other options allow you to find the mode and median.

OPTIONS

	   -i  Only return the integer portion of the final sum.
	   -I  Only return the decimal portion of the final sum

	   -m  Find the mode (most occuring) of the list of numbers,
	       or when there's more than one mode, the first completed mode.
	   -M  Find the median (middle number) of the list of numbers.
	   -l  When finding the median and the count of numbers in the set is even,
	       use the lower middle number instead of the upper middle number.

	   -h  Help: You're looking at it.
	   -V  Increase verbosity.
	   -d  Debug mode.  For developers

SEE ALSO

       numbound(1), numinterval(1), numnormalize(1), numgrep(1), numprocess(1), numsum(1), numrandom(1), numrange(1), numround(1)

COPYRIGHT

       numaverage is part of the num-utils package, which is copyrighted by Suso Banderas and released under the GPL license.  Please read the
       COPYING and LICENSE files that came with the num-utils package

	 Developers can read the GOALS file and contact me about providing
       submitions or help for the project.

MORE INFO

       More info on numaverage can be found at:

       http://suso.suso.org/programs/num-utils/

perl v5.10.1							    2009-10-31							     NUMAVERAGE(1)
All times are GMT -4. The time now is 02:12 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy