Sponsored Content
Top Forums Shell Programming and Scripting Find Where Values Change From Positive To Negative and viceversa Post 302506762 by malandisa on Monday 21st of March 2011 10:40:15 PM
Old 03-21-2011
Thank you Chubler_XL! it works perfectly. I thought I had understood this command but I realize I have not fully understood what the command really does. My understanding was that this part
Quote:
($2*prev2<0)
represents an if statement so that if it is satisfied, then the part in curly brackets '{}' just to the right is performed. And now I am not sure how the addition of the '$2' solves this problem

Thank you again
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help in adding positive & negative values in a column

Hi Gurus, In my file I have an amount field from position 74 to 87, which contains values starting with '+' as well as '-'. I want to add all positive values in a varible called "CREDIT" and all negative values in a variable "DEBIT". I know, we can use grep to identify values with positive and... (4 Replies)
Discussion started by: berlin_germany
4 Replies

2. Shell Programming and Scripting

Perl output with negative and positive numbers

Hello, For my weather station I have made a little perl script to put the data into cacti. The next problem I have. I can only get positive numbers or negative numbers. What do I do: Though a shell scrip I call the perl script. Shell script: #!/bin/sh cat data.txt | stats.pl Perl... (4 Replies)
Discussion started by: rbl-blacklight
4 Replies

3. Shell Programming and Scripting

Finding the most positive and negative value and defining its position

Hi, I have a file that looks like this: Jake 2 3 4 6 4 3 -2 -1 Jerry 1 2 3 2 1 7 -6 -1 Timmy -1 -4 -5 -8 9 3 1 I want to find the most positive and negative value for each row and also define its position (based on column #) So the output would look... (7 Replies)
Discussion started by: gisele_l
7 Replies

4. Shell Programming and Scripting

Sorting positive and negative values

Hello, I have a list like this : 1 2 -4 0 -3 -7 5 6 etc. Is there a way to remove all the positive values and print only the negative values, without using grep, sed or awk? Thanks, Prasanna (4 Replies)
Discussion started by: prasanna1157
4 Replies

5. Shell Programming and Scripting

addition of both positive and negative numbers

Let, I have three numbers +00123.25 -00256.54 +00489.23 I need to sum up all those three numbers, after storing them in three variables (say var1, var2, var3). I used both expr and BC, but they didn't work for me. But, I am not able to sum up them, as I don't have any idea how to... (13 Replies)
Discussion started by: mady135
13 Replies

6. Shell Programming and Scripting

Taking largest (negative) number from column of coordinates and adding positive form to every other

Hello all, I'm new to the forums and hope to be able to contribute something useful in the future; however I must admit that what has prompted me to join is the fact that currently I need help with something that has me at the end of my tether. I have a PDB (Protein Data Bank) file which I... (13 Replies)
Discussion started by: crunchgargoyle
13 Replies

7. Shell Programming and Scripting

Splitting a file based on positive and negative numbers

Dear All, I have to split a tab delimited file in two files based on the presence of a positive or negative in column number 9 , for example file: A 1 5 erg + 6766 0.9889 0.9817 9.01882 erg inside upstream B 1 8 erg2 + 6766 0.9889 0.9817 -9.22 erg2 inside... (3 Replies)
Discussion started by: paolo.kunder
3 Replies

8. UNIX for Beginners Questions & Answers

Converting negative number to positive in a file

Hi ALL, I am having semi column separated file as below. I am having negative values for the records starting with 11095. How can I convert that positive number I tried this below seems not working sed 's/ \(*\)$/ -\1/;t;s/\(.*\)-/\1/ myfile myfile... (6 Replies)
Discussion started by: arunkumar_mca
6 Replies

9. UNIX for Beginners Questions & Answers

Splitting a file based on negative and positive numbers

I have a file that is pipe delimited and in Column F they have number values, both positive and negative. I need to take the one file I am starting with and split it into two separate files based on negative and positive numbers. What is the command to do so? And then I need to also transfer... (4 Replies)
Discussion started by: cckaiser15
4 Replies
httppower(8)							     powerman							      httppower(8)

NAME
httppower - communicate with HTTP based power distribution units SYNOPSIS
httppower [--url URL] DESCRIPTION
httppower is a helper program for powerman which enables it to communicate with HTTP based power distribution units. It is run interac- tively by the powerman daemon. OPTIONS
-u, --url URL Set the base URL. INTERACTIVE COMMANDS
The following commands are accepted at the httppower> prompt: auth user:pass Authenticate to the base URL with specified user and password, using ``basic'' HTTP authentication which sends the user and password over the network in plain text. seturl URL Set the base URL. Overrides the command line option. get [URL-suffix] Send an HTTP GET to the base URL with the optional URL-suffix appended. post [URL-suffix] key=val[&key=val]... Send an HTTP POST to the base URL with the optional URL-suffix appended, and key-value pairs as argument. FILES
/usr/sbin/httppower /etc/powerman/powerman.conf ORIGIN
PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters. This software is open source and distributed under the terms of the GNU GPL. SEE ALSO
powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7). http://sourceforge.net/projects/powerman powerman-2.3.5 2009-02-09 httppower(8)
All times are GMT -4. The time now is 11:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy