Merge columns from multiple files Post: 302784141

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Top Forums UNIX for Dummies Questions & Answers Merge columns from multiple files Post 302784141 by torchij on Thursday 21st of March 2013 02:15:39 PM

Old

03-21-2013

Registered User

Merge columns from multiple files

Hi all, I've searched the web for a long time trying to figure out how to merge columns from multiple files.

I know paste will append columns like so:

Code:

paste file1 file2 file3 file4 file5 ...

But this becomes inconvenient when you want to append a large number of files into a single file.

For example, say I have 20 files each with a single column that I would like to append column wise into a single file.

Code:

cat file1
a
b
c
d
e

cat file2
a
b
c
d
e

cat filen...
a
b
c
d
e

output

Code:

a a a etc...
b b b etc...
c c c etc...
d d d etc...
e e e etc...

Is there any way to adapt a code that will work for "N" number for files??

Many thanks,
torch

torchij

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LEARN ABOUT MINIX

paste

PASTE(1)						      General Commands Manual							  PASTE(1)

NAME

       paste - paste multiple files together

SYNOPSIS

       paste [-s] [-d list] file...

OPTIONS

       -d     Set delimiter used to separate columns to list.

       -s     Print files sequentially, file k on line k.

EXAMPLES

       paste file1 file2   # Print file1 in col 1, file2 in col 2

       paste -s f1 f2	   # Print f1 on line 1 and f2 on line 2

       paste -d : file1 file2
			   # Print the lines separated by a colon

DESCRIPTION

       Paste  concatenates  corresponding  lines of the given input files and writes them to standard output. The lines of the different files are
       separated by the delimiters given with the option -s. If no list is given, a tab is substituted for every linefeed, except  the	last  one.
       If  end-of-file	is hit on an input file, subsequent lines are empty.  Suppose a set of k files each has one word per line.  Then the paste
       output will have k columns, with the contents of file j in column j.  If the -s flag is given, then the first file is on line 1, the second
       file on line 2, etc.  In effect, -s turns the output sideways.

       If  a list of delimiters is given, they are used in turn.  The C escape sequences 
, 	, \, and  are used for linefeed, tab, backslash,
       and the null string, respectively.

																	  PASTE(1)