04-27-2009
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
SIL 0.34
ai 0.9
b 0.29
bh 0.19
ssil 0.87
I want to calculate the mean and standard deviation for each letter. I am able to calculate for single letter, but cant do for whole date at a time.
grep -e '^a' file | grep -v 'aa'|grep -v 'ai'|grep -v 'au' > test.file
awk '{sum+=$2}END{print "Mean = ",sum/NR}' test.file
Thanks in advance.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
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. UNIX for Dummies Questions & Answers
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
3. Shell Programming and Scripting
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
4. Shell Programming and Scripting
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
5. Shell Programming and Scripting
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 $50
I need to calculate the RMS deviation for each data line, i.e. column 1 relative to... (12 Replies)
Discussion started by: chrisjorg
12 Replies
6. Shell Programming and Scripting
Hi All,
I want someone to modify the below script from this forum so that it can be used for all columns in the file( instead of only printing column 3 mean and standard deviation values). I don't know how to loop around all the columns.
... (3 Replies)
Discussion started by: ks_reddy
3 Replies
7. Shell Programming and Scripting
Hi,
I have a file containing 100,000 rows-by-120 columns and I need to compute for the standard deviation for each row. Any idea on how to calculate row-wise standard deviation using awk? My sample data looks like this:
input data:
23 35 12 25 16 17 18 19 29 12
12 26 15 14 15 23 12 12... (2 Replies)
Discussion started by: ida1215
2 Replies
8. Shell Programming and Scripting
Hello there,
I found an elegant solution to computing average values from multiple text files
awk '{for (i=1;i<=NF;i++){if ($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
9. Shell Programming and Scripting
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
10. Shell Programming and Scripting
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
awk -F, -v points=5 ' { a = $2; ... (4 Replies)
Discussion started by: csierra
4 Replies
LEARN ABOUT MOJAVE
platform::shell
platform::shell(n) Tcl Bundled Packages platform::shell(n)
__________________________________________________________________________________________________________________________________________________
NAME
platform::shell - System identification support code and utilities
SYNOPSIS
package require platform::shell ?1.1.4?
platform::shell::generic shell
platform::shell::identify shell
platform::shell::platform shell
_________________________________________________________________
DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.
This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
requirement is that the other shell (identified by its path), is actually executable on the current machine.
While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell
this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.
For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed
packages, versus the architecture of the shell running the repository software.
COMMANDS
platform::shell::identify shell
This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.
platform::shell::generic shell
This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.
platform::shell::platform shell
This command returns the contents of tcl_platform(platform) for the specified Tcl shell.
KEYWORDS
operating system, cpu architecture, platform, architecture
platform::shell 1.1.4 platform::shell(n)