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AWK to merge multiple files side by side


 
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# 1  
Old 06-01-2011
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 merge two files. But in the above mention method I want to merge 100s of files.

Thanks,
kantharaj.
# 2  
Old 06-01-2011
what about this one:

Code:
for i in {1..100}
do
    for f in a.txt b.txt
    do
        printf "%s" `head -$i $f|tail -1`
    done
    echo ""    
done

Where variable i loops through the lines one by one
# 3  
Old 06-01-2011
Would 'paste' be helpful?
# 4  
Old 06-01-2011
not sure how paste would work with hundreds of files, but it will take a regular expression... i.e.

paste doc?.txt > combined.txt

will take all files doc?.txt files and paste them into combined.txt
# 5  
Old 06-01-2011
just give a try to
Code:
paste doc*.txt >combined.txt

and see if you get what you need
# 6  
Old 06-01-2011
paste takes wild card file names, I have just tried.

Code:
paste [abc].txt >combined.txt


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