Sponsored Content
Top Forums Shell Programming and Scripting awk - function to return permutations of n items out of m Post 303028532 by cjnwl on Thursday 10th of January 2019 07:27:56 AM
Old 01-10-2019
Thanks Guys, that's exactly what I was looking for

--- Post updated at 12:27 PM ---

Note that the various shell scripts don't reply to the question, which was first of all for awk (as this is part of a much larger script that I've been given to modify), but more importantly, hard-coded the number of elements.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Return an array of strings from user defined function in awk

Hello Friends, Is it possible to return an array from a user defined function in awk ? example: gawk ' BEGIN{} { catch_line = my_function(i) print catch_line print catch_line print catch_line } function my_function(i) { print "echo" line= "awk" line= "gawk"... (2 Replies)
Discussion started by: user_prady
2 Replies

2. Shell Programming and Scripting

Function's return value used inside awk

I have a file with the record of person: cat > $TMP/record.txt John Torres M Single 102353 Address Mark Santos M Maried 103001 Address Carla Maria F Maried 125653 Address #!/bin/ksh ManipulateID(){ ... return 0; ... #or return 1; } cat $TMP/record.txt | awk 'BEGIN {printf... (4 Replies)
Discussion started by: Orbix
4 Replies

3. Shell Programming and Scripting

awk between items including items

OS=HP-UX ksh The following works, except I want to include the <start> and <end> in the output. awk -F '<start>' 'BEGIN{RS="<end>"; OFS="\n"; ORS=""} {print $2} somefile.log' The following work in bash but not in ksh sed -n '/^<start>/,/^<end>/{/LABEL$/!p}' somefile.log (4 Replies)
Discussion started by: Ikon
4 Replies

4. Shell Programming and Scripting

Return a value from called function to the calling function

I have two scripts. script1.sh looks -------------------------------- #!/bin/bash display() { echo "Welcome to Unix" } display ----------------------------- Script2.sh #!/bin/bash sh script1.sh //simply calling script1.sh ------------------------------ (1 Reply)
Discussion started by: mvictorvijayan
1 Replies

5. Shell Programming and Scripting

awk, help me - counting items and listing them

This is my first ever post... please help! :o I have two columns....here is part of the file... 12, 46798 6692, 46799 5710, ... (3 Replies)
Discussion started by: pelhabuan
3 Replies

6. Shell Programming and Scripting

Permutations with awk

Hello I have a very simple input file in which there are a list of numbers: 1 2 3 4 5 6 7 8 9 10 My actual dataset is about 200 lines long. I was wondering how to add different permutations of 3 numbers for all the numbers in the dataset. For example: 1+2+3; 3+5+7; 2+8+1; 9+3+4... (1 Reply)
Discussion started by: Rabu
1 Replies

7. UNIX for Dummies Questions & Answers

awk colon separated items

Hi, I need to filter my data based on items in column 23. Column 1 until column 23 are tab separated. This is how column 23 looks like: PRIMARY=<0/1:504:499,5:.:.:.:0.01:1:15:.> I want to extract lines if items 7 (separated by : ) in column 23 are more than 0.25 . In example above , item... (2 Replies)
Discussion started by: janshamsani
2 Replies

8. Shell Programming and Scripting

awk permutations and combinations

hello, I'm reading this thread, in which there is this code :awk ' function comb(v,i) { for(i in A) { delete A; if(length(A)) comb((v?v"+":x)i) else print v"+"i A; } } { A } END { comb(); } ' infilebut I can't understand where does v come... (5 Replies)
Discussion started by: daPeach
5 Replies

9. Shell Programming and Scripting

Return: can only `return' from a function or sourced script

Not sure where the problem is. I can run the script without any issue using the following command. . /opt/app/scripts/cdc_migration.sh But it fails with the below error when I try it this way /opt/app/scripts/cdc_migration.sh /opt/app/scripts/cdc_migration.sh: line 65: return: can only... (1 Reply)
Discussion started by: svajhala
1 Replies

10. Shell Programming and Scripting

Function - Make your function return an exit status

Hi All, Good Day, seeking for your assistance on how to not perform my 2nd, 3rd,4th etc.. function if my 1st function is in else condition. #Body function1() { if then echo "exist" else echo "not exist" } #if not exist in function1 my all other function will not proceed.... (4 Replies)
Discussion started by: meister29
4 Replies
TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME
truncate - shrink or extend the size of a file to the specified size SYNOPSIS
truncate OPTION... FILE... DESCRIPTION
Shrink or extend the size of each FILE to the specified size A FILE argument that does not exist is created. If a FILE is larger than the specified size, the extra data is lost. If a FILE is shorter, it is extended and the extended part (hole) reads as zero bytes. Mandatory arguments to long options are mandatory for short options too. -c, --no-create do not create any files -o, --io-blocks treat SIZE as number of IO blocks instead of bytes -r, --reference=FILE use this FILE's size -s, --size=SIZE use this SIZE --help display this help and exit --version output version information and exit SIZE may be (or may be an integer optionally followed by) one of following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y. SIZE may also be prefixed by one of the following modifying characters: `+' extend by, `-' reduce by, `<' at most, `>' at least, `/' round down to multiple of, `%' round up to multiple of. Note that the -r and -s options are mutually exclusive. AUTHOR
Written by Padraig Brady. REPORTING BUGS
Report truncate bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report truncate translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
dd(1), truncate(2), ftruncate(2) The full documentation for truncate is maintained as a Texinfo manual. If the info and truncate programs are properly installed at your site, the command info coreutils 'truncate invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 TRUNCATE(1)
All times are GMT -4. The time now is 06:52 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy