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Replacing column with another column of different file by awk

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# 1  
Old 09-28-2010
Replacing column with another column of different file by awk
Hi All,

I will really appreciate if you kindly lookinto my requirement below and provide me a solution

First file format test1.txt
Code:
qq    ww   rr   tt   ee  ff
qq    ww   rr   tt   ee  ff

Second file format text2.txt
Code:
aa
aa

Now o/p I want as text1.txt's 4th column replaced by 1st column of second file
Code:
qq    ww   rr   aa   ee  ff
qq    ww   rr   aa   ee  ff

Please help me to solve this

Moderator's Comments:
Mod Comment Having 34 posts you should be familiar using code tags - please do so next time!
# 2  
Old 09-28-2010
Try this.

Code:
[muthuk@nexthallwhen-dx tmp]$ cat file.txt
qq    ww   rr   tt   ee  ff
qq    ww   rr   tt   ee  ff
[muthuk@nexthallwhen-dx tmp]$ cat file1.txt
aa
aa
[muthuk@nexthallwhen-dx tmp]$ paste file.txt file1.txt | awk '{ print $1"\t"$2"\t"$3"\t"$NF"\t"$5"\t"$6; }'
qq      ww      rr      aa      ee      ff
qq      ww      rr      aa      ee      ff

It will help out.
# 3  
Old 09-28-2010
Or:
Code:
awk 'NR==FNR{a[NR]=$0;next} {$4=a[FNR]}1' OFS="\t" test2.txt test1.txt

# 4  
Old 09-28-2010
Quote:
Originally Posted by kmuthu_gct
Try this.

Code:
[muthuk@nexthallwhen-dx tmp]$ cat file.txt
qq    ww   rr   tt   ee  ff
qq    ww   rr   tt   ee  ff
[muthuk@nexthallwhen-dx tmp]$ cat file1.txt
aa
aa
[muthuk@nexthallwhen-dx tmp]$ paste file.txt file1.txt | awk '{ print $1"\t"$2"\t"$3"\t"$NF"\t"$5"\t"$6; }'
qq      ww      rr      aa      ee      ff
qq      ww      rr      aa      ee      ff

It will help out.
a variant:
Code:
paste f1 f2 |  awk '{$4=$7;$7=""}1' OFS="\t"

# 5  
Old 09-28-2010
Code:
$ ruby  -ane 'BEGIN{a=[];b=File.read("file2").split}; $F[3]=b[$.-1]; puts $F.join(" ")' file
qq ww rr aa ee ff
qq ww rr aa ee ff

# 6  
Old 09-28-2010
Code:
awk '{t=$0;getline<"test1.txt";$4=t}1' test2.txt

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