12-30-2012
Everything in awk has the form condition{action}. If the condition evaluates to 1 then the action is performed. If the condition is omitted then the default condition is 1, so the action is always performed. If the action is omitted then the default action is performed, which is {print $0} .
In this case the condition is "1" so that evaluates to 1 and the action is omitted, therefore {print $0} is performed, which is "print the entire record".
Last edited by Scrutinizer; 12-30-2012 at 07:55 AM..
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello. Im just starting to learn awk so hang in there with me...I have a large text file formatted as such everything is in a single column
ID001
value 1
value 2
value....n
ID002
value 1
value 2
value... n
I want to be able to calculate the average for values for each ID from the... (18 Replies)
Discussion started by: johnmillsbro
18 Replies
2. Shell Programming and Scripting
Dear Guyz:)
I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z).
I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Discussion started by: repinementer
16 Replies
3. Shell Programming and Scripting
Hi,
I have a file "input.txt" with the following content :
5312,0,,,1,8,141.2,20090727
3714,0,,,1,8,285.87,20090727
5426,0,,,1,8,3.9,20090727
3871,0,,,1,8,30.4,20090727
9071,0,,,1,8,146.2,20090727
5141,0,,,1,8,2.8,20090727
0460,0,,,1,8,-0.1,20090727
7918,0,,,1,8,-0.1,20090727... (3 Replies)
Discussion started by: valokv
3 Replies
4. Shell Programming and Scripting
Hello,
I have 2 columns (1st column has multiple entries but the corresponding values in the column 2 may be the same or different.) however I want to extract unique values for each entry in column 1 by assigning the max value from column 2
SDF4 -0.211654
SDF4 0.978068
... (1 Reply)
Discussion started by: Diya123
1 Replies
5. UNIX for Dummies Questions & Answers
Hi all !
If there is only one single value in a column (e.g. column 1 below), then return this value in the same output column.
If there are several values in the same column (e.g. column 2 below), then return the different values separated by "," in the output.
pipe-separated input:
... (11 Replies)
Discussion started by: lucasvs
11 Replies
6. UNIX for Dummies Questions & Answers
Hi,
I am using the following code to change NA to X in only the 5th column of my text file:
awk '{gsub("NA","x",$5)}1' in.file > out.file
How can I modify this code if I want to change NA to X in multiple columns of the text file (i.e. columns 5,6 and 7). Thanks! (2 Replies)
Discussion started by: evelibertine
2 Replies
7. Shell Programming and Scripting
Hi,
My input files is like this
axis1 0 1 10
axis2 0 1 5
axis1 1 2 -4
axis2 2 3 -3
axis1 3 4 5
axis2 3 4 -1
axis1 4 5 -6
axis2 4 5 1
Now, these are my following tasks
1. Print a first column for every two rows that has the same value followed by a string.
2. Match on the... (3 Replies)
Discussion started by: jacobs.smith
3 Replies
8. Shell Programming and Scripting
Dear Unix experts,
I have got a file where I would like to compare the values of second column if first column is same in such a way that the difference between the values is >50. If not, I would like to discard both values.
For example, my input file looks like -
comp275_c0_seq2 73... (7 Replies)
Discussion started by: utritala
7 Replies
9. Shell Programming and Scripting
I'm trying to make an awk script to compare values I've set as var1, var2, and var3 earlier in the script to the values in the userinputted column of four text files called Node1.txt, Node2.txt, Node3.txt, and Node4.txt and then replace the values in that userinputted column with either ttt or gcc,... (8 Replies)
Discussion started by: Eric1
8 Replies
10. Shell Programming and Scripting
Please help me to get required output for both scenario 1 and scenario 2 and need separate code for both scenario 1 and scenario 2
Scenario 1
i need to do below changes only when column1 is CR and column3 has duplicates rows/values. This inputfile can contain 100 of this duplicated rows of... (1 Reply)
Discussion started by: as7951
1 Replies
ssignal(3C) ssignal(3C)
NAME
ssignal(), gsignal() - software signals
SYNOPSIS
DESCRIPTION
and implement a software facility similar to signal(5). This facility is used by the Standard C Library to enable users to indicate the
disposition of error conditions, and is also made available to users for their own purposes.
Software signals made available to users are associated with integers in the inclusive range 1 through 15. A call to associates a proce-
dure, action, with the software signal sig; the software signal, sig, is raised by a call to Raising a software signal causes the action
established for that signal to be taken.
The first argument to is a number identifying the type of signal for which an action is to be established. The second argument defines the
action; it is either the name of a (user-defined) action function or one of the manifest constants (default) or (ignore). returns the
action previously established for that signal type; if no action has been established or the signal number is illegal, returns
raises the signal identified by its argument, sig:
o If an action function has been established for sig, that action is reset to and the action function is entered with argument sig.
returns the value returned to it by the action function.
o If the action for sig is returns the value 1 and takes no other action.
o If the action for sig is returns the value 0 and takes no other action.
o If sig has an illegal value or no action was ever specified for sig, returns the value 0 and takes no other action.
SEE ALSO
signal(5), thread_safety(5).
NOTES
Some additional signals with numbers outside the range 1 through 15 are used by the Standard C Library to indicate error conditions. Those
signal numbers outside the range 1 through 15 are legal, although their use may interfere with the operation of the Standard C Library.
STANDARDS CONFORMANCE
ssignal(3C)