join based on line number when one file is missing lines


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# 1  
join based on line number when one file is missing lines

I have a file that contains 87 lines, each with a set of coordinates (x & y). This file looks like:
Code:
1 200.3 -0.3
2 201.7 -0.32
...
87 200.2 -0.314

I have another file which contains data that was taken at certain of these 87 positions. i.e.:

Code:
37 125
42 175
86 142

where the first number is the line number of the coordinates in the other file. Is there a way to get an output like:

Code:
37 201.2 -0.324 125
42 200.1 -0.311 175
86 203.0 -0.35 142

where I am pulling columns 2 & 3 from the first file with 87 lines, and column 4 from the second file (in this example with 3 lines but I want to be able to do more)?

I've tried using join to do this but it doesn't bring up anything!

Thanks!
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 06-27-2011 at 09:09 PM.. Reason: code tags, please!
# 2  
Code:
nawk 'FNR==NR{data[$1]=$2;next} $1 in data {print $0, data[$1]}' dataFile coordinatesFile

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