Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk problem
Top Forums Shell Programming and Scripting awk problem Post 302893167 by Corona688 on Monday 17th of March 2014 04:21:06 PM
Old 03-17-2014
In situations where you need to 'think back' like this I find it helpful to read the file twice... Once to figure it out, then again to modify and print.

Code:
$ awk -F, -v OFS="," 'NR==FNR { if($2 == 1) L++ ; A[L+0]++; next } # All lines of first file
FNR==1 {L=0} # First line of second file
{ if(A[L]<0) L++; $3=A[L]--; } 1' input input

1,0,5
2,0,4
3,0,3
4,0,2
5,0,1
6,1,0
7,0,5
8,0,4
9,0,3
10,0,2
11,1,1

$

For the first file, it counts up A[L] for each and every line. Every time it finds a 1, it increases L by one too. So A[0] is a count of how many lines were between it and the first one, etc.

The second file it does the exact opposite, counting down. Whenever A[L] goes negative, it increments L one.

It's not bidirectional like yours though yet. You might need to keep two counters and take the minimum.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

AWK Problem

Hi, I posted something here about this yesterday but I can't seem to find it. I needed help writting a script which would append a file with new lines after every so many charachters. Example: (my original flat file) L60 LETTER OF CREDIT 60 DAYS W00 ON RECEIPT WIRE TRANSFER W30 NET... (12 Replies)
Discussion started by: gseyforth
12 Replies

2. Shell Programming and Scripting

Problem with AWK

Hi all, How can i use the below unix command in AWK . Can any one please suggest me how i can use. sed -e "s/which first.sh/which \$0/g" $shell > $shell.sal where $0=current program name(say current.sh) $shell=second.sh (1 Reply)
Discussion started by: krishna_gnv
1 Replies

3. Shell Programming and Scripting

Problem with AWK

Hi All, How can i store a value of the unix command executed in AWK with system command. devise=`cut -c1-3 dvgp.txt` I wrote this command in awk as awk'{ code= sprintf("devise=`cut -c1-3 dvgp.txt`"); system(code); }' Is this correct. can you please suggest me how the code can be... (1 Reply)
Discussion started by: krishna_gnv
1 Replies

4. Shell Programming and Scripting

problem using awk

Hi there every body I'm new to shell scripting and there is a problem facing me,, please look at the following piece of code: awk ' BEGIN{ FS="<assertion id=\1"; RS="<assertion id=\"2"}/<assertion id=\"1/{print FS$2 > "/home/ds2/test/output.txt"} ' filename all I wanna do is to... (6 Replies)
Discussion started by: senior_ahmed
6 Replies

5. Shell Programming and Scripting

Awk problem: How to express the single quote(') by using awk print function

Actually I got a list of file end with *.txt I want to use the same command apply to all the *.txt Thus I try to find out the fastest way to write those same command in a script and then want to let them run automatics. For example: I got the file below: file1.txt file2.txt file3.txt... (4 Replies)
Discussion started by: patrick87
4 Replies

6. Shell Programming and Scripting

Problem with awk awk: program limit exceeded: sprintf buffer size=1020

Hi I have many problems with a script. I have a script that formats a text file but always prints the same error when i try to execute it The code is that: { if (NF==17){ print $0 }else{ fields=NF; all=$0; while... (2 Replies)
Discussion started by: fate
2 Replies

7. Shell Programming and Scripting

awk problem

Find the number of files with sizes > 100KB in /, /bin, /usr, /usr/bin and /usr/sbin directories and output them in a two column format with the name of the directory and the number of files. i tried with awk $>ls -lh | awk '/^-/ && $5 >= 100k {print $8 $5}' but it is not working pls tell... (3 Replies)
Discussion started by: abhikamune
3 Replies

8. UNIX for Dummies Questions & Answers

Little problem with AWK

I thought I had solved this problem but after testing the script I came to realize that it is not doing what I need. So, here it goes again. This is the code: awk '/\>/{F=$2; N=$3; split(FILENAME, A, "."); getline; x = ">"}{print ">" A"-" x++" "F" " N"\n" $0}' This is the input file: ... (5 Replies)
Discussion started by: Xterra
5 Replies

9. Shell Programming and Scripting

awk problem - combining awk statements

i have a datafile that has several lines that look like this: 2,dataflow,Sun Mar 17 16:50:01 2013,1363539001,2990,excelsheet,660,mortar,660,4 using the following command: awk -F, '{$3=strftime("%a %b %d %T %Y,%s",$3)}1' OFS=, $DATAFILE | egrep -v "\-OLDISSUES," | ${AWK} "/${MONTH} ${DAY}... (7 Replies)
Discussion started by: SkySmart
7 Replies

10. Shell Programming and Scripting

awk problem

i have an email list in file.txt with comma separated line1 - FIELD1,pippo@gmail.com,darth@gmail.com line2 - FIELD2,pippo@gmail.com,darth@gmail.com,sampei@gmail.com output=(awk -F ',' -v var="$awkvar" '$1==var {print $2,$3,$4}' spreadsheet.txt)but awk delete some letters at the... (8 Replies)
Discussion started by: pasaico
8 Replies

LEARN ABOUT MOJAVE

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD
All times are GMT -4. The time now is 02:21 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy