Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: SMA (Single Moving Average) and Standard Deviation
Top Forums Shell Programming and Scripting SMA (Single Moving Average) and Standard Deviation Post 303003066 by csierra on Thursday 7th of September 2017 09:13:01 AM
Old 09-07-2017
Hammer & Screwdriver SMA (Single Moving Average) and Standard Deviation
Hello Team,

I am using the following awk script to calculate the SMA (Single Moving Average) for an specific period but now I would like to include the standard deviation output.

Could you please help me to modify this awk shell script


Code:
awk -F, -v points=5 '   {   a[NR % points] = $2;    if(NR>=points) {  total_a = 0;    for (i = 0; i < points; ++i)       { total_a = total_a + a[i]; }        print ($1, $2, total_a/points);  }  }' data.csv

Input Data
Code:
Row    Data
1    10.09
2    10.14
3    10.02
4    10.13
5    10.1
6    10.06
7    10.15
8    9.91
9    9.99
10    9.72
11    9.75
12    9.57
13    9.62
14    9.97
15    9.71
16    9.77
17    9.88
18    9.71
19    9.75
20    9.53
21    9.46
22    9.38
23    9.63
24    9.67
25    9.92
26    10.04

Expected Output:

Code:
Row    Data    SMA 5    Standard Deviation 5 Period
5    10.1    10.096    0.042237424
6    10.06    10.09    0.04472136
7    10.15    10.092    0.047074409
8    9.91    10.07    0.085556999
9    9.99    10.042    0.084237759
10    9.72    9.966    0.146232691
11    9.75    9.904    0.158442419
12    9.57    9.788    0.147837749
13    9.62    9.73    0.145464772
14    9.97    9.726    0.138361844
15    9.71    9.724    0.138506318
16    9.77    9.728    0.139484766
17    9.88    9.79    0.123450395
18    9.71    9.808    0.102058807
19    9.75    9.764    0.062481997
20    9.53    9.728    0.113912247
21    9.46    9.666    0.152131522
22    9.38    9.566    0.142632395
23    9.63    9.55    0.129460419
24    9.67    9.534    0.106695829
25    9.92    9.612    0.187339264
26    10.04    9.728    0.231637648

data.xls (28.5 KB) 
standard_deviation.xls (29.5 KB) 
 

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

Moving Averages SMA !

Hello, I am trying to create a awk script to calculate the simple moving average of two fields but I got only the result of the first field. Could you please help me to fix this awk shell script awk -F, -v points=5 ' { a = $2; b = $3; if(NR>=points) { total_a = 0; total_b... (1 Reply)
Discussion started by: csierra
1 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

calculating row-wise standard deviation using awk

Hi, I have a file containing 100,000 rows-by-120 columns and I need to compute for the standard deviation for each row. Any idea on how to calculate row-wise standard deviation using awk? My sample data looks like this: input data: 23 35 12 25 16 17 18 19 29 12 12 26 15 14 15 23 12 12... (2 Replies)
Discussion started by: ida1215
2 Replies

9. Shell Programming and Scripting

Computing average and standard deviation from multiple text files

Hello there, I found an elegant solution to computing average values from multiple text files awk '{for (i=1;i<=NF;i++){if ($i!~"n/a"){a+=$i}else{b++}}}END{for (i=1;i<=FNR;i++){for (j=1;j<=NF;j++){printf (a/(3-b))((b>0)?"~"b" ":" ")};printf "\n"}}' file1 file2 file3 I tried to modify... (2 Replies)
Discussion started by: charmmilein
2 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

grdinfo

GRDINFO(l)																GRDINFO(l)

NAME

       grdinfo - Get information about the contents of a 2-D grd file

SYNOPSIS

       grdinfo grdfiles [ -C ] [ -D ] [ -F ] [ -L1 ] [ -L2 ] [ -M ] [ -V ]

DESCRIPTION

       grdinfo reads a 2-D binary grd file and reports various statistics for the (x,y,z) data in the grdfile. The output information contains the
       minimum/maximum values for x, y, and z, where the min/max of z occur, the x- and y-increments, and  the	number	of  x  and  y  nodes,  and
       [optionally] the mean, standard deviation, and/or the median, L1 scale of z, and number of nodes set to NaN.

       grdfile
	      The name of one or several 2-D grd files.

OPTIONS

       No space between the option flag and the associated arguments.

       -C     Formats  the report using tab-separated fields on a single line. The output is w e s n z0 z1 dx dy nx ny [ x0 y0 x1 y1 ] [ med scale
	      ] [ mean std rms] [n_nan].  The data in brackets are output only if the corresponding options -M, -L1, -L2, and -M are used, respec-
	      tively.

       -D     Report grid domain and x/y-increments using dd:mm:ss[.fff] notation [Default is decimal].  Does not apply to the -C option.

       -F     Report grid domain and x/y-increments world mapping format [Default is generic].	Does not apply to the -C option.

       -L1    Report median and L1 scale of z (L1 scale = 1.4826 * Median Absolute Deviation (MAD)).

       -L2    Report mean and standard deviation of z.

       -M     Find and report the location of min/max z-values, and count and report the number of nodes set to NaN, if any.

       -V     Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].

EXAMPLES

       To obtain all the information about the data set in file hawaii_topo.grd, try

       grdinfo -L1 -L2 -M hawaii_topo.grd

SEE ALSO

       gmt(1gmt), grd2cpt(1gmt), grd2xyz(1gmt), grdedit(1gmt)

								    1 Jan 2004								GRDINFO(l)
All times are GMT -4. The time now is 08:42 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy