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Merge columns on different files

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# 1  
Old 10-09-2013
Merge columns on different files
Hello, I have two files that have this format:

file 1
Code:
86.82 0.00  86.82 43.61
86.84 0.00  86.84 43.61
86.86 0.00  86.86 43.61
86.88 0.00  86.88 43.61

file 2
Code:
86.82 0.22
86.84 0.22
86.86 0.22
86.88 0.22

I would like to merge these two files such that the final file looks like this:
Code:
86.82 0.00  86.82 43.61 86.82 0.22
86.84 0.00  86.84 43.61 86.84 0.22
86.86 0.00  86.86 43.61 86.86 0.22
86.88 0.00  86.88 43.61 86.88 0.22

Can someone please help?
# 2  
Old 10-09-2013
Assumption files are sorted and missing columns should get 0.00:

Code:
join -o 1.1,1.2,1.3,1.4,2.1,2.2 -e "0.00" file1 file2

# 3  
Old 10-10-2013
An awk approach may try

Code:
$ cat f2
86.82 0.22
86.84 0.22
86.86 0.22
86.88 0.22

Code:
$ cat f1
86.82 0.00  86.82 43.61
86.84 0.00  86.84 43.61
86.86 0.00  86.86 43.61
86.88 0.00  86.88 43.61

Code:
$ awk 'FNR==NR{_[$1]=$0;next}{printf($1 in _)?$0 FS _[$1] RS:""}' f2 f1

Resulting
Code:
86.82 0.00  86.82 43.61 86.82 0.22
86.84 0.00  86.84 43.61 86.84 0.22
86.86 0.00  86.86 43.61 86.86 0.22
86.88 0.00  86.88 43.61 86.88 0.22

# 4  
Old 10-10-2013
@Akshay Hegde
Using _ as a variable name is not a good idea. It makes beginners wonder what is going on. Its valid, but use some thing else, like this:
Code:
awk 'FNR==NR{arr[$1]=$0;next}{printf($1 in arr)?$0 FS arr[$1] RS:""}' f2 f1

When you see some like this example, its not easy to see what is going on Smilie
awk '_ && _--;/test/{_=3}' file
# 5  
Old 10-10-2013
Thank you Jotne.. what you said is true it will be difficult for beginners to understand
# 6  
Old 10-10-2013
Code:
sort file1 file2 | paste -d"\t\n" -s 
86.82 0.00  86.82 43.61    86.82 0.22
86.84 0.00  86.84 43.61    86.84 0.22
86.86 0.00  86.86 43.61    86.86 0.22
86.88 0.00  86.88 43.61    86.88 0.22

Last edited by RudiC; 10-10-2013 at 08:59 AM.. Reason: forgot code tags
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