Sponsored Content
Top Forums Shell Programming and Scripting Script to place selected columns from a group of files side by side in a new file Post 302286492 by quirkasaurus on Wednesday 11th of February 2009 09:29:58 AM
Old 02-11-2009
you can grab the columns using:

awk '{ print $1, $2 }' file_nm > file_nm_out

and combine ( up to 12 -- but some characters might get swallowed up )
the 2-column-output-files with paste:

paste file1 file2 > file_comb.1

However, with lots of files... this will become a little bit of a challenge.

I'm willing to bet there's an easier approach to your actual problem.

meaning -- why do the first 2 columns need to appear in a new file?
and how many files are we actually talking about?
what is the final destination for this data file we're building?
how were the initial files created in the first place?

it seems if we redesign any one of these steps, we might be able to design a better end-to-end process.

Perhaps you could restate the actual issue?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Merge 2 text files to one text file side by side

Inquiring minds want to know.... I need to take two files that I have latitude and longitude values and then combine them into one file with the values side by side separated by a space. the first file is temp113-lat.txt and the second is temp113-lon.txt. They each have values listed in the... (15 Replies)
Discussion started by: ahinkebein
15 Replies

2. Shell Programming and Scripting

Merge 3 columns side by side

I know this is a stupid question for you guys! half day googling and i got nothing :( i have 3 variables/files, say: $X1 or file1: # there is one whitespace space after each line | 21 | 9 | 28 | 100 | 51 $X2 or file2: # there is one whitespace space... (7 Replies)
Discussion started by: amaulana
7 Replies

3. Shell Programming and Scripting

How to Merge / combine / join / paste 2 text files side-by-side

I have 2 text files, both have one simple, single column. The 2 files might be the same length, or might not, and if not, it's unknown which one would be longer. For this example, file1 is longer: ---file1 Joe Bob Mary Sally Fred Elmer David ---file2 Tomato House Car... (3 Replies)
Discussion started by: cajunfries
3 Replies

4. Shell Programming and Scripting

Paste two file side by side together based on specific pattern match problem

Input file_1: P78811 P40108 O17861 Q6NTW1 P40986 Q6PBK1 P38264 Q6PBK1 Q9CZ49 Q1GZI0 Input file_2: (6 Replies)
Discussion started by: patrick87
6 Replies

5. Shell Programming and Scripting

printing 3 files side by side based on similar values in rows

Hi I'm trying to compare 3 or more files based on similar values and outputting them into 3 columns. For example: file1 ABC DEF GHI file2 DEF DER file3 ABC DER The output should come out like this file1 file2 file3 ABC ABC (4 Replies)
Discussion started by: zerofire123
4 Replies

6. Shell Programming and Scripting

AWK to merge multiple files side by side

I have about 100s of files of type text in a known directory. I want to merge all files side by side. Number of lines in all the files will remain same. For example file1 contains cat dog File 2 contains rat mat Output file should be cat rat dog mat Using awk I was able to... (5 Replies)
Discussion started by: kanthrajgowda
5 Replies

7. Shell Programming and Scripting

How to print contents side by side of a file ?

Hi Team, I have input like Input file.txt Contents: Total: 939720704 bytes Total: 521142272 bytes Total: 262144 bytes Total: 786432 bytes Total: 9043968 bytes Total: 9371648 bytes I need out put like the content of file should be side by side.that is 1st line beside... (3 Replies)
Discussion started by: rocking77
3 Replies

8. Shell Programming and Scripting

Combining two single column files side-by-side

Hi, I am looking for a sed/awk script to join two large (~300 M) single column files (one is sorted and the other is not sorted) side-by-side. I have a shell script but its taking ages to do the task so looking for an optimized fast solution. The two files look like: File1 (sorted) a1... (1 Reply)
Discussion started by: sajal.bhatia
1 Replies

9. Shell Programming and Scripting

Merging two text files side by side

Hi everyone, I need to merge two files side by side The files look something like this: HOSTNAME fishtornado-K52F 127.0.1.1 UPTIME 20:17:01 up 2:19, 3 users, load average: 0.00, 0.04, 0.05 DISK USAGE (Size/Used/Avail/Use%) 29G 6.5G 21G 25% RUN QUEUE PID COMMAND USER ... (4 Replies)
Discussion started by: FishTornado
4 Replies

10. Shell Programming and Scripting

Import 2 columns from 8 .csv files into pandas df (side by side) and write a new csv

I have 8 .csv files with 16 columns and "n" rows with no Header. I want to parse each of these .csv and get column and put the data into a new.csv. Once this is done, the new.csv should have 16 columns (2 from each input.csv) and "n" rows. Now, I want to just take the average of Column from... (3 Replies)
Discussion started by: Zam_1234
3 Replies
paste(1)						      General Commands Manual							  paste(1)

NAME
paste - Joins corresponding lines of several files or subsequent lines in one file SYNOPSIS
paste [-d list] [-s] file... STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: paste: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
Replaces the delimiter that separates lines in the output (tab by default) with one or more characters from list. If list contains more than one character, then the characters are repeated in order until the end of the output. In parallel merging, the lines from the last file always end with a newline character, instead of one from list. The following special characters can be used in list: Newline character Tab Backslash Empty string (not a null character) [Tru64 UNIX] An extended character You must quote characters that have special meaning to the shell. Merges all lines from each input file into one line of output (serial merging). Using this option, the paste command merges all lines in the first input file forcing a newline before at the end. The command then continues with the next input file, continuing in the same manner until all input files have been completed. A tab separates the input lines unless you use the -d option. Regardless of the list, the last character of the output is a newline character. OPERANDS
The name of an input file. You may specify up to 12 files, including hyphens. If you specify a -, paste reads standard input recursively, one line for each -. DESCRIPTION
Specifying the -d option or no options causes the paste command to treat each file as a column, joining them horizontally with a tab char- acter by default (parallel merging). Using the -s option, the paste command combines all lines of each input file into one output line (serial merging). These lines are joined with the tab character by default. Output lines can be any length. [Tru64 UNIX] The output of pr -t -m is similar to the output produced by the paste command, but pr with its options creates extra spaces, tabs, and lines for an enhanced page layout. RESTRICTIONS
If the -s option is not used, it is an error if any specified file cannot be opened. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. EXAMPLES
To paste several columns of data together, enter: paste names places dates > npd This creates a file named npd that contains the data from names in one column, places in another, and dates in a third. The columns are separated by tab characters. File npd then contains: rachel New York 28 February jerzy Warsaw 27 April mata Nairobi 21 June michel Boca Raton 27 July segui Managua 18 November A tab character separates the name, place, and date on each line. To separate the columns with a character other than a tab (sh only), enter: paste -d"!@" names places dates > npd This alternates the apostrophe (!) and the at sign (@) as the column separators. If names, places, and dates are the same as in Example 1, then npd contains: rachel!New York@28 February jerzy!Warsaw@27 April mata!Nairobi@21 June michel!Boca Raton@27 July segui!Managua@18 November To dis- play the standard input in multiple columns, enter: ls | paste - - - - This lists the current directory in four columns. Each hyphen (-) tells the paste command to create a column containing data read from the standard input. The first line is put in the first column, the second line in the second column, ... and then the fifth line in the first column, and so on. This is equivalent to ls | paste -d" " -s - which fills the columns across the page with subsequent lines from the standard input. The -d defines the character to insert after each column: a tab character ( ) after the first three columns, and a newline character ( ) after the fourth. Without the -d option, paste -s - displays all of the input as one line with a tab between each column. To merge the lines of the file names above into one output line, enter: paste -s names This results in: rachel jerzy mata michel segui ENVIRONMENT VARIABLES
The following environment variables affect the execution of paste: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments and input files). Determines the locale for the format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: cut(1), grep(1), fold(1), join(1), pr(1) Standards: standards(5) paste(1)
All times are GMT -4. The time now is 01:02 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy