Sponsored Content
Top Forums Shell Programming and Scripting Make copy of text file with columns removed (based on header) Post 302931591 by RudiC on Wednesday 14th of January 2015 04:18:53 AM
Old 01-14-2015
If you want those fields removed in every record, not just the header, try:
Code:
awk     'NR==3          {MX=split (RM, T, " ")
                         for (i=1; i<=NF; i++)
                             for (n=1; n<=MX; n++)
                                 if ($i==T[n]) T[n]=i
                        }
         !(NR%3)        {for (n=1; n<=MX; n++) $(T[n])=""
                         $0=$0; $1=$1
                        }
         1
        ' FS="\t+" OFS="\t" RM="dxv1 k2" file

This User Gave Thanks to RudiC For This Post:
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Merging two files based on two columns to make a third file

Hi there, I'm trying to merge two files and make a third file. However, two of the columns need to match exactly in both files AND I want everything from both files in the output if the two columns match in that row. First file looks like this: chr1 10001980 T A Second... (12 Replies)
Discussion started by: infiniteabyss
12 Replies

2. Shell Programming and Scripting

Copy and Paste Columns in a Tab-Limited Text file

I have this text file with a very large number of columns (10,000+) and I want to move the first column to the position of the six column so that the text file looks like this: Before cutting and pasting ID Family Mother Father Trait Phenotype aaa bbb ... (5 Replies)
Discussion started by: evelibertine
5 Replies

3. UNIX for Dummies Questions & Answers

Extracting rows from a text file based on the values of two columns (given ranges)

Hi, I have a tab delimited text file with multiple columns. The second and third columns include numbers that have not been sorted. I want to extract rows where the second column includes a value between -0.01 and 0.01 (including both numbers) and the first third column includes a value between... (1 Reply)
Discussion started by: evelibertine
1 Replies

4. Shell Programming and Scripting

Reading columns from a text file and to make an array for each column

Hi, I am not so familiar with bash scripting and would appreciate your help here. I have a text file 'input.txt' like this: 2 3 4 5 6 7 8 9 10 I want to store each column in an array like this a ={2 5 8}, b={3 6 9}, c={4 7 10} so that i can access any element, e.g b=6 for the later use. (1 Reply)
Discussion started by: Asif Siddique
1 Replies

5. Shell Programming and Scripting

Extract columns based on header

Hi to all, I have two files. File1 has no header, two columns: sample1 A sample2 B sample3 B sample4 C sample5 A sample6 D sample7 D File2 has a header, except for the first 3 columns (chr,start,end). "sample1" is the header for the 4th ,5th ,6th columns, "sample2" is the header... (4 Replies)
Discussion started by: aec
4 Replies

6. Emergency UNIX and Linux Support

Average columns based on header name

Hi Friends, I have files with columns like this. This sample input below is partial. Please check below for main file link. Each file will have only two rows. ... (8 Replies)
Discussion started by: jacobs.smith
8 Replies

7. UNIX for Beginners Questions & Answers

Keep only columns in first two rows based on partial header pattern.

I have this code below that only prints out certain columns from the first two rows (doesn't affect rows 3 and beyond). How can I do the same on a partial header pattern “G_TP” instead of having to know specific column numbers (e.g. 374-479)? I've tried many other commands within this pipe with no... (4 Replies)
Discussion started by: aachave1
4 Replies

8. Shell Programming and Scripting

Find columns in a file based on header and print to new file

Hello, I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need, # file with header names of required columns in required order headers_file=$2 # read contents... (11 Replies)
Discussion started by: LMHmedchem
11 Replies

9. Shell Programming and Scripting

Find header in a text file and prepend it to all lines until another header is found

I've been struggling with this one for quite a while and cannot seem to find a solution for this find/replace scenario. Perhaps I'm getting rusty. I have a file that contains a number of metrics (exactly 3 fields per line) from a few appliances that are collected in parallel. To identify the... (3 Replies)
Discussion started by: verdepollo
3 Replies
TABS(1) 						    BSD General Commands Manual 						   TABS(1)

NAME
tabs -- set terminal tabs SYNOPSIS
tabs [-n | -a | -a2 | -c | -c2 | -c3 | -f | -p | -s | -u] [+m[n]] [-T type] tabs [-T type] [+[n]] n1[,n2,...] DESCRIPTION
The tabs utility displays a series of characters that clear the hardware terminal tab settings then initialises tab stops at specified posi- tions, and optionally adjusts the margin. In the first synopsis form, the tab stops set depend on the command line options used, and may be one of the predefined formats or at regular intervals. In the second synopsis form, tab stops are set at positions n1, n2, etc. If a position is preceded by a '+', it is relative to the previous position set. No more than 20 positions may be specified. If no tab stops are specified, the ``standard'' UNIX tab width of 8 is used. The options are as follows: -n Set a tab stop every n columns. If n is 0, the tab stops are cleared but no new ones are set. -a Assembler format (columns 1, 10, 16, 36, 72). -a2 Assembler format (columns 1, 10, 16, 40, 72). -c COBOL normal format (columns 1, 8, 12, 16, 20, 55) -c2 COBOL compact format (columns 1, 6, 10, 14, 49) -c3 COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 67). -f FORTRAN format (columns 1, 7, 11, 15, 19, 23). -p PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61). -s SNOBOL format (columns 1, 10, 55). -u Assembler format (columns 1, 12, 20, 44). +m[n], +[n] Set an n character left margin, or 10 if n is omitted. -T type Output escape sequence for the terminal type type. ENVIRONMENT
The LANG, LC_ALL, LC_CTYPE and TERM environment variables affect the execution of tabs as described in environ(7). The -T option overrides the setting of the TERM environment variable. If neither TERM nor the -T option are present, tabs will fail. EXIT STATUS
The tabs utility exits 0 on success, and >0 if an error occurs. SEE ALSO
expand(1), stty(1), tput(1), unexpand(1), termcap(5) STANDARDS
The tabs utility conforms to IEEE Std 1003.1-2001 (``POSIX.1''). HISTORY
A tabs utility appeared in PWB UNIX. This implementation was introduced in FreeBSD 5.0. BUGS
The current termcap(5) database does not define the 'ML' (set left soft margin) capability for any terminals. BSD
May 20, 2002 BSD
All times are GMT -4. The time now is 05:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy