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join command

join, shell scripts

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# 1  
Old 11-05-2009
join command


my problem is:
I've 2 files like:

1 3.791406e-03 65388.3
6 8.568031e-01 1.47768e+07
17 1.323488e-01 2.28255e+06
47 5.928275e-03 102242
50 1.037607e-03 17895
89 9.085876e-05 1566.99
1 3.839507e-03 66217.9
6 8.563433e-01 1.47689e+07
10 0.000000e+00 0
17 0.000000e+00 0
..so many zeros
47 5.863369e-03 101122
50 1.020259e-03 17595.9
..so many zeros
89 0.0000000e+00 0
..so many zeros
I'd like to get file_out:
1 3.791406e-03 65388.3 3.839507e-03 66217.9
6 8.568031e-01 1.47768e+07 8.563433e-01 1.47689e+07
17 1.323488e-01 2.28255e+06 0.000000e+00 0
47 5.928275e-03 102242 5.863369e-03 101122
50 1.037607e-03 17895 1.020259e-03 17595.9
89 9.085876e-05 1566.99 0.0000000e+00 0
I mean if the field is different from zero in the first file i want take that field also in the second(no matter if in the second is zero).

I tried with the join command but it doesn't work always and i don't understand why.
Can anyone help please?

thanks in advance

# 2  
Old 11-05-2009
Something like this with awk:

awk 'NR==FNR{a[$1]=$2 FS $3; next}a[$1]{print $0 FS a[$1]}' file2 file1

# 3  
Old 11-05-2009

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