Programming :: Awk Syntax For Calculating Average And Standard Deviation
Apr 20, 2011
I have a data in a column.
Code:
I want to calculate average and standard deviation. As first step I want to calculate average for the data than calculate (del=data - avg) for all the data.
I suppose get
Code:
For this I use AWK and the code goes like this
Code:
But I get different answers.
Code:
Why the answers are so different? since this is wrong I can not continue calculating the standard deviation.
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Jan 27, 2010
With array in php. All I was having the following columns:
Code:
Now Like the Above there were more variables defined through script:
Code:
Now what the above code is doing is calculating average of above values from columns{1-?,4-?)..likewise
Say If I remove two Machine and calculate the avg.
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Apr 25, 2010
I'm trying to write a python script that will calculate my test scores from a text file named "exams."
Sample input would be:
Output will look like:
I have the following code:
Code:
My intent is to sum the values found in L and divide by len(L).
I think my issue is that when I split the values, I get a string array (ex. ['85', '90'] ), which makes it hard to do calculations.
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Apr 23, 2010
I am new to shell script and to this form as well, I did try to search for a similar post like mine here, but could not find one.
Here is what I'm trying to do:
I am trying to grep server logs to find a specific string and then capture the time stamp and the value of that grep string in them. The log file prints out messages on per sec basis.
My script is able to grep the server logs for the entire period of my load runs and then outputted it to a .csv file too.
Unfortunately this .csv file is too large to extract it on my PC and to generate graphs as it exceeds the excel limit. I need some help on how to read this .csv file in a shell script and then take an average on per min basis before I can export it out on my desktop and generate graphs for analysis. example of the out in my .csv file:
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Mar 25, 2011
I'm writing a script which will calculate bandwidth usage, I'm monitoring the bandwidth with cacti and the results don't quite line up, can someone either correct my script (if it contains faults) or tell me why the results aren't the same. I'm using a guide obtained from cisco here: [URL]. Here's my code:
Code:
SNMPCOMMUNITY=public
IP=127.0.0.1
INTNUMBER=1
OUT=$(snmpget -v2c -c $SNMPCOMMUNITY $IP ifOutOctets.$INTNUMBER | awk '{print $4}')
[Code]....
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Nov 20, 2010
I have a text file with 4 columns and 18 rows. All are integers. I wish to find the average of first 12 numbers in the third column using 'awk'.
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Apr 29, 2010
I have a file which has several entries with
# comment 1
1245
# comment 2
5667
# comment 3
456456
how can I read the file, sum the numbers ( "avoid" the #lines) and then get the average of the numbers?
I do awk '{s+=$0} END {print s}' /tmp/file.txt. and this give me the sum correctly, but how can I get also the average ?
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Feb 10, 2011
I'm new to the linux world and its been quit sometime since i've done any programming. However, I'm writing a program which simply calculates the load average of a process. In doing this I need to use the uptime command for linux in a java program. I've done a little bit of searching on the net and it mentions this is possiable by using java runtime command. Unfortunatly though I have yet to find a working example of this. I've tried just simply reading the /proc/uptime file but I have no clue how to format the 2 numbers in seconds to make it the same as if you just typed in uptime in the linux command prompt.
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Jul 21, 2010
Where is the location of the header files for the c++ standard library?
I assume that they were installed by gnu g++, please correct me if i'm wrong.
I'm running ubuntu 10.04 with g++ 4.4.
I looked in /usr/lib/gcc/i486-linux-gnu/4.4/include, but this directory contains only the following:
Code:
Which doesnt seem to include the really basic things like iostream, for example.
Where can I take a look at the header files for these standard c++ libraries?
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Jul 14, 2010
Is it possible to do the following in C/C++ in Linux:Without direct linking (my program should NOT depend on Qt or GTK), display a GTK or Qt based file dialog.The behaviour should be something like this when my program runs, when you want to open a file:The program scans whether you have Qt installed. If so, it somehow manages to link itself to Qt (e.g. dynamically loading the .so file) and display its file dialog and get the path from it. If Qt wasn't found, it tries the same with GTK. If that also wasn't found, it displays a less powerful replacement dialog instead (better than nothing).
Or is there any other simple way in Linux to get a standard file dialog somehow (similar to when compiling for Windows you can very easily get its standard file dialog, no matter what version of Windows, in your code, even if your program doesn't use any other Windows GUI at all).
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Sep 22, 2010
I am making a program to reverse a string
Code:
#include<stdio.h>
int main ()
{
int i,j;
[Code].....
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Mar 14, 2010
Code:
x = self.spinbox37.value() * 40
y = self.spinbox38.value() * 40
[code]...
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Apr 29, 2010
I have an error, which I have no idea why appears. All brackets seems ok.
error:
Code:
Code:
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Jan 25, 2011
I am having an XML file,i want to verify the file for its syntax,
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Mar 7, 2011
When ever i open vim, i get the error that the following error: E484: Can't open file/abcd/configFiles/vim/syntax/syntax.vim There was a .vimrc file in my home folder that i have removed.
Still i keep getting the same error. Presently in my home folder there is no .gvimrc or .vimrc file.
But still i keep getting the same error. I am not too sure where this file is mentioned.
Background info: The SHELL has been changed from tcsh to bash Earlier i had created a .vimrc file in tcsh, i have removed the .vimrc in bash SHELL.
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Mar 26, 2010
I'm trying to pull out sections from a bunch of files. For one file, I use:
Code:
sed '/string1/,/string2/ !d' <filename.ext >newfilename.ext
to pull out everything between two strings in the original file and put them in a new file.
[code]....
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Feb 17, 2010
I have created two threads:
Thread 1 and thread 2
In the main thread, i have put up a timer which generates a signal periodically when it expires, which reults in execution going to signal catcher function.when this function is invoked, under certain condition it goes to thread 1 and under another condition it goes to thread 2. The problem lies here that when it goes to thread2,i have a loop to process but it doesnt come out of the loop and hence from thread2, even though timer has expired.
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Feb 22, 2011
Is there any document or specification like the Linux Standard Base for the naming convention of commandline options?
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Jan 5, 2010
The code is attached..My intention is that getchar which usually blocks,should come out after 5 seconds(VTIME).But this is not happening..can anyone tell me the mistake that I make..?
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
[code]...
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Sep 4, 2010
From cat.c in GNU coreutils:
Code:
void
usage (int status)
{
if (status != EXIT_SUCCESS)
fprintf (stderr, _("Try `%s --help' for more information.
[Code]...
I don't remember ever seeing this in any examples I've ever seen, so I'm sure I've never seen an explanation of this.
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Jan 1, 2011
I am setting some environmental variable in my .bashrc , the sample code I was provided with is for CSH but I am using bash, and there are some syntax differences between them ... I got most of the script to work, but I am getting an error at this part :
Code: if ($RMSTREE == $RMANTREE) then
set path=($path $RMANTREE/bin)
else
[code]...
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Mar 9, 2011
#by executing bash file
#!/bin/sh
sed -i 's/if (IEexec || domExec) document.write('<iframe id="IdMyIframe" '+IframePropriedades+'></iframe>');//g' *.php
Output is:
line 4: syntax error near unexpected token `<'
line 4: 'sed -i 's/if (IEexec || domExec) document.write('<iframe id="IdMyIframe" '+IframePropriedades+'></iframe>');//g' *.php'
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Feb 10, 2010
I am reading Sams Teach Yourself SQL in one hour a day. In this book they work with both Oracle and MySQL to teach you SQL. So I installed mysql on my box and I am creating the empty database they use in this book so I can follow along as I read. I have noticed a few typos in the book and now I have noticed some code errors too. I just don't know enough to fix em. I am working on creating the empty database and I am getting syntax errors when I create certain tables. I have checked both the printed version of the book and the electronic version (which differ slightly) and both give me the same synatax errors. First is Creating the first table of the database. Here is the code given to me to enter. The Electronic version
[code]...
how I can correct this error and create these tables?
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Jun 18, 2010
I'm fairly new to shell scripting and am having the hardest time figuring out why this simple script is giving me an error
The error is "syntax error near unexpected token `else'
I'm using TextEdit on OSX (sorry I'm limited to this). The only thing I can think of is that it's reading some return character and getting thrown off. I've tried saving the script using different encoding types but the same error pops up.
I also get an error at line 2 because it does not regonize as a command
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Apr 2, 2010
I was going through init/calibrate.c.url
I am not clear with use of + sign before function names. If any one here is aware of this syntax let me know.
They have used + and - signs before some lines I am not sure of what they are?
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Mar 22, 2009
I want to write a little time-saving alias for my .cshrc file that will move files and then cd to the directory I've moved them to. What I can't quite figure out is the syntax to say 'move all the arguments except the last one.' Here is what I have:
alias follow 'mv !:1-$-1 !:$; cd !:$'
This actually seems to work, but it also gives me an irritating error:
mv: cannot stat `destinationdirectory/-1': No such file or directory
Similarly, I tried:
alias follow 'mv !:*$#argv-1 !:$; cd !:$'
Again the move and cd are successful, but again there is an error:
mv: cannot stat `destinationdirectory/0-1': No such file or directory
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Mar 23, 2010
I am writing a code in bash script, in my ubuntu command terminal. The program should send the message, "Hello John!!" 5 times to john's terminal (assuming he is logged on to the server). But I keep getting this error: Syntax error: end of file unexpected (expecting "done").
#!/usr/bin/sh
clear
x=1 # this sets up the flag so we can have it send a limited amount
while [ $x -le 5 ]
do
write jdouglas << EFO
>Hello John!!
>EFO
x=$(( $x + 1 ))
done
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Jan 6, 2011
I'm reading "Understanding the Linux Kernel" and came upon this assembly instruction:
movl $(__KERNEL_CS << 16), %eax
I am curious as to what "<<" means/does. I tried to gooogle, but google doesn't search for "<<".
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May 26, 2010
I'm trying to find all the files in a specified directory that do NOT end in .archived or .error and are older than 30 mins. Currently I have: Code: find /opt/edi/incoming -type f ! ( -name "*.archived" -name "*.error" ) -cmin 30 But I keep returning files that end in those extensions and I'm not sure if I'm using -cmin correcty? If there is a better way to do this (perl, etc) I'm open to options, this is for a nagios check.
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Dec 26, 2010
I'm new to scripting and I have a trouble with if statement syntax. The code is: Code: #there is a diff command here, and it does what i want but#i wanna see 1 if the exit value of diff is 0, and otherwise i wanna see 0.#the problem is here: (syntax error near unexpected token "then")
if["$?"==0];
then
echo 1
[code].....
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