compare fields in different files


 
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# 1  
Old 12-06-2011
compare fields in different files

HI

I'm having some troubles to compare and permut diffrent fields indexed with another filed like the following example `:

Code:
file1

1 1
2 2
3 3

Code:
file2

7 1
9 2
10 3

result-------------------

Code:
file1

7 1
9 2
10 3


Code:
file2

1 1
2 2
3 3


thanks in advance
# 2  
Old 12-06-2011
join might do what you need. Now to make it clearer, I changed file1 to:
Code:
A 1
B 2
C 3

So with join, you get:
Code:
[b]$[b] join -j 2 file1 file2 
1 A 7
2 B 9
3 C 10

You can use awk, sed, cut, or many other commands to trim off the first field:
Code:
$ join -j 2 file1 file2 | cut -d' ' -f2-
A 7
B 9
C 10

# 3  
Old 12-06-2011
sorry I guess there is misunderstanding here, I want to take the maximun value in the first field (first column) indexed whith the second colomn. file1 must have those max values. here is another example

Code:
file 1

6   1
7   2
8   3

Code:
file 2

3   1
9   2
10  3

after processing file 1 become

Code:
file 1
6   1
9   2
10   3

and file2

Code:
file 1
3   1
7   2
8   3

I guess it's clear enough thank you again for your effort
# 4  
Old 12-07-2011
I have no idea what you are trying to do. What is being indexed? Please give a verbal description of your process, or something.
# 5  
Old 12-07-2011
What i want to do is to compute a max number within element sharing the same index and to put that max in file 1 and 2 second max in file2 etc

in other way sorting the elements having the same index and afecting the first element in the first file (with its index) second element in the second file ....
if that clear enough?
# 6  
Old 12-07-2011
Answer :)

Hi all !

I guess, I understand the question, I've put the 'index' in the first column

Code:
soy@machine: temporal > cat uno.txt
1 4
2 8
3 9
4 1
soy@machine: temporal > cat dos.txt
1 2
2 6
3 4
4 9
soy@machine: temporal > join uno.txt dos.txt
1 4 2
2 8 6
3 9 4
4 1 9
soy@machine: temporal > join uno.txt dos.txt > unidos.txt
soy@machine: temporal >  awk '{ if( $2 >= $3){ print $1, $2 }; if ( $3> $2){ print $1, $3}}' unidos.txt
1 4
2 8
3 9
4 9

best regards
# 7  
Old 12-07-2011
hi maya_style

it's exactly what I want to do ! except one detail

If i want to redirect the result to a file I will do like that

Code:
awk '{ if( $2 >= $3){ print $1, $2 }; if ( $3> $2){ print $1, $3}}' unidos.txt >> result_file

but I want also to redirect the rest of the temporal file file to another file eg :
Code:
another file : 
1 2
2 6
3 4
4 1

thanks a lot
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