Sponsored Content
Top Forums Shell Programming and Scripting Aligning text files by max field length Post 302546514 by physalis2099 on Thursday 11th of August 2011 10:55:33 AM
Old 08-11-2011
Aligning text files by max field length

Hello,
Is there anyway that I can align a pipe delimited text file by the maxium field length where the field is separated out by pipes for large text files with more than
100,000 rows?

So, far I have searched other forums and google about aligning text files in unix and I have noticed that several other users use the awk utility. Since I am new to awk
I have attempted in writing my own code after reading some of the awk utility syntax, but I am getting stuck.
If awk is not the best utility to achieve this is there any way to code this???

My test code:

#!/bin/ksh
awk 'BEGIN {FS = "|"}
{
for(i=1;i<=NF;i++)
{
if (length($i) > max)
max = length($i)
maxlen($i) = max
}
}
END
{
for (i in max) print (i,max)
}
' $(find . -name "testfile.txt")

Below is a sample of the text file that I have:

Pipe Delimited Text file
YEAR|NAME|PRODUCT_ID|ORDER_ID|CUSTOMER_ID
2001|Unix book|12354|01587|5487651484
2002|Programming|65487|6564548|654365146
2003|Airsoft Guns|6544888|548|65498
2004|Video Games|101100018|44|648
2010|Wayside Stories from wayside school|5487454|4|64645646
.
.
.

Desired Output:

YEAR|NAME |PRODUCT_ID|ORDER_ID|CUSTOMER_ID
2001 |Unix book |12354 |01587 |5487651484
2002 |Programming |65487 |6564548 |654365146
2003 |Airsoft Guns |6544888 |548 |65498
2004 |Video Games |101100018 |44 |648
2010 |Wayside Stories from wayside school|5487454 |4 |64645646
.
.
.

Thanks,
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Length of a Unix filepath max length

Hi Guys, Could anyone shed some light on the length of a Unix filepath max length pls ? thanks ! Wilson (3 Replies)
Discussion started by: wilsontan
3 Replies

2. Shell Programming and Scripting

what is the max length of args i can pass in shell?

i have a shell script which takes several args. what is the maximum length of string i can give as argument? (6 Replies)
Discussion started by: senthilk615
6 Replies

3. UNIX for Dummies Questions & Answers

Read file and remove max length

Hi all, I tried to write a shell to read huge file and eliminate max length record which is wrong generated record. But I get an error remove_sp.sh: line 27: syntax error near unexpected token `else' remove_sp.sh: line 27: ` else $LINE >> REJFILE' My shell is here: #!/bin/sh... (5 Replies)
Discussion started by: mr_bold
5 Replies

4. Shell Programming and Scripting

Counting the max length of string

Hi all, I have a flat file of 1000 rows. I want to check the length of the 5th column. The one having the longest length , I want to set it as DEFINED PARAMETER. So later I can check others with that particular number only. Any ideas ?? (2 Replies)
Discussion started by: ganesh123
2 Replies

5. UNIX for Advanced & Expert Users

How to increase max username length?

Hi, This is my first post to this site. So kindly forgive if I am writing in a wrong section. My query is that... I want to modify the max username length size. I guess it is 32/64 on CentOS. Now I want to change it to 128. Is there any way to do that? Thanks in advance!! :) (4 Replies)
Discussion started by: ajay303
4 Replies

6. UNIX for Dummies Questions & Answers

Modify the max username length

Hey Any one... Do u know any way I can modify the max username length in unix? I guess it is 32/64 characters by default. Suppose I want to increase it to 128. i hav tried /etc/skel but no use... How can I do that? (2 Replies)
Discussion started by: MayureshRisbud
2 Replies

7. Shell Programming and Scripting

Flat file-make field length equal to header length

Hello Everyone, I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table. Input Data- ------ ------------------------ ---- ----------------- WFI001 Xxxxxx Control Work Item A Number of Records ------ ------------------------... (5 Replies)
Discussion started by: sonali.s.more
5 Replies

8. Shell Programming and Scripting

Aligning columns in a text file using Perl

Hi All, I am new to perl and was trying to write a simple program which will generate a text file as output.. now the output which i am getting is something like this.. ================================================================================================== Col1 ... (8 Replies)
Discussion started by: smarty86
8 Replies

9. Shell Programming and Scripting

Read text between regexps and write into files based on a field in the text

Hi, I have a huge file that has data something like shown below: huge_file.txt start regexp Name=Name1 Title=Analyst Address=Address1 Department=Finance end regexp some text some text start regexp Name=Name2 Title=Controller Address=Address2 Department=Finance end regexp (7 Replies)
Discussion started by: r3d3
7 Replies

10. Shell Programming and Scripting

Find max length of the field and then replace zero

hai guys, pick the 1st field and calculate max length. if suppose max length is 2, then compare the all records if <2 then add zero's prefix of the record. for ex: s.no,sname 1,djud 37,jtuhe in this max length of the 1st field is 2 right the output wil be s.no,sname 01,djud... (6 Replies)
Discussion started by: Suneelbabu.etl
6 Replies
LAM(1)							    BSD General Commands Manual 						    LAM(1)

NAME
lam -- laminate files SYNOPSIS
lam [-f min.max] [-s sepstring] [-t c] file ... lam [-p min.max] [-s sepstring] [-t c] file ... DESCRIPTION
The lam utility copies the named files side by side onto the standard output. The n-th input lines from the input files are considered frag- ments of the single long n-th output line into which they are assembled. The name `-' means the standard input, and may be repeated. Normally, each option affects only the file after it. If the option letter is capitalized it affects all subsequent files until it appears again uncapitalized. The options are described below: -f min.max Print line fragments according to the format string min.max, where min is the minimum field width and max the maximum field width. If min begins with a zero, zeros will be added to make up the field width, and if it begins with a `-', the fragment will be left- adjusted within the field. -p min.max Like -f, but pad this file's field when end-of-file is reached and other files are still active. -s sepstring Print sepstring before printing line fragments from the next file. This option may appear after the last file. -t c The input line terminator is c instead of a newline. The newline normally appended to each output line is omitted. To print files simultaneously for easy viewing use pr(1). EXAMPLES
The command lam file1 file2 file3 file4 joins 4 files together along each line. To merge the lines from four different files use lam file1 -S " " file2 file3 file4 Every 2 lines of a file may be joined on one line with lam - - < file and a form letter with substitutions keyed by `@' can be done with lam -t @ letter changes SEE ALSO
join(1), paste(1), pr(1), printf(3) STANDARDS
Some of the functionality of lam is standardized as the paste(1) utility by IEEE Std 1003.2 (``POSIX.2''). BUGS
The lam utility does not recognize multibyte characters. BSD
August 12, 2004 BSD
All times are GMT -4. The time now is 08:49 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy