How can I extract records with a column in common?
up vote
4
down vote
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I have two tables with different numbers of columns and rows. I want to find rows using a common column (column B is in common). Here is an example. Could you please help?
file1.txt
A B C D
a b c d
i ii iii iV
* ** # ##
file2.txt
E B
f ff
h b
g gg
k ii
output:
A B C D E
a b c d h
i ii iii iV k
command-line text-processing
asked 1 hour ago
Negar
364
add a comment |
up vote
4
down vote
favorite
I have two tables with different numbers of columns and rows. I want to find rows using a common column (column B is in common). Here is an example. Could you please help?
file1.txt
A B C D
a b c d
i ii iii iV
* ** # ##
file2.txt
E B
f ff
h b
g gg
k ii
output:
A B C D E
a b c d h
i ii iii iV k
command-line text-processing
asked 1 hour ago
Negar
364
2
Could you explain what you are doing in a bit more detail please? Why is the last line offile1not in the output? And why is column B unchanged in the output while column E is added?
– terdon♦
1 hour ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago
add a comment |
up vote
4
down vote
favorite
up vote
4
down vote
favorite
I have two tables with different numbers of columns and rows. I want to find rows using a common column (column B is in common). Here is an example. Could you please help?
file1.txt
A B C D
a b c d
i ii iii iV
* ** # ##
file2.txt
E B
f ff
h b
g gg
k ii
output:
A B C D E
a b c d h
i ii iii iV k
command-line text-processing
asked 1 hour ago
Negar
364
I have two tables with different numbers of columns and rows. I want to find rows using a common column (column B is in common). Here is an example. Could you please help?
file1.txt
A B C D
a b c d
i ii iii iV
* ** # ##
file2.txt
E B
f ff
h b
g gg
k ii
output:
A B C D E
a b c d h
i ii iii iV k
command-line text-processing
command-line text-processing
asked 1 hour ago
Negar
364
asked 1 hour ago
Negar
364
edited 1 hour ago
asked 1 hour ago
Negar
364
asked 1 hour ago
Negar
364
asked 1 hour ago
Negar
364
364
2
Could you explain what you are doing in a bit more detail please? Why is the last line offile1not in the output? And why is column B unchanged in the output while column E is added?
– terdon♦
1 hour ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago
add a comment |
2
Could you explain what you are doing in a bit more detail please? Why is the last line offile1not in the output? And why is column B unchanged in the output while column E is added?
– terdon♦
1 hour ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago
2
2
Could you explain what you are doing in a bit more detail please? Why is the last line of
file1 not in the output? And why is column B unchanged in the output while column E is added?– terdon♦
1 hour ago
Could you explain what you are doing in a bit more detail please? Why is the last line of
file1 not in the output? And why is column B unchanged in the output while column E is added?– terdon♦
1 hour ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago
add a comment |
1 Answer
1
active
oldest
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up vote
3
down vote
You can do this kind of thing by building a hash / associative array / lookup table e.g. using Awk:
$ awk 'NR==FNR{B[$2]=$1; next} $2 in B {print $0,B[$2]}' file2.txt file1.txt
A B C D E
a b c d h
i ii iii iV k
There's also the join command - but that requires inputs to be sorted on the common field.
answered 1 hour ago
steeldriver
65.3k11104176
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
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active
oldest
votes
up vote
3
down vote
You can do this kind of thing by building a hash / associative array / lookup table e.g. using Awk:
$ awk 'NR==FNR{B[$2]=$1; next} $2 in B {print $0,B[$2]}' file2.txt file1.txt
A B C D E
a b c d h
i ii iii iV k
There's also the join command - but that requires inputs to be sorted on the common field.
answered 1 hour ago
steeldriver
65.3k11104176
add a comment |
up vote
3
down vote
You can do this kind of thing by building a hash / associative array / lookup table e.g. using Awk:
$ awk 'NR==FNR{B[$2]=$1; next} $2 in B {print $0,B[$2]}' file2.txt file1.txt
A B C D E
a b c d h
i ii iii iV k
There's also the join command - but that requires inputs to be sorted on the common field.
answered 1 hour ago
steeldriver
65.3k11104176
add a comment |
up vote
3
down vote
up vote
3
down vote
You can do this kind of thing by building a hash / associative array / lookup table e.g. using Awk:
$ awk 'NR==FNR{B[$2]=$1; next} $2 in B {print $0,B[$2]}' file2.txt file1.txt
A B C D E
a b c d h
i ii iii iV k
There's also the join command - but that requires inputs to be sorted on the common field.
answered 1 hour ago
steeldriver
65.3k11104176
You can do this kind of thing by building a hash / associative array / lookup table e.g. using Awk:
$ awk 'NR==FNR{B[$2]=$1; next} $2 in B {print $0,B[$2]}' file2.txt file1.txt
A B C D E
a b c d h
i ii iii iV k
There's also the join command - but that requires inputs to be sorted on the common field.
answered 1 hour ago
steeldriver
65.3k11104176
answered 1 hour ago
steeldriver
65.3k11104176
answered 1 hour ago
steeldriver
65.3k11104176
answered 1 hour ago
steeldriver
65.3k11104176
65.3k11104176
add a comment |
add a comment |
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2
Could you explain what you are doing in a bit more detail please? Why is the last line of
file1not in the output? And why is column B unchanged in the output while column E is added?– terdon♦
1 hour ago
@terdon: I have two tables including some parameters of many galaxies. Assume table one include "mass" , "name","color" and "distance" of galaxies and table 2 include "velocity" and "name". . some galaxies are in common so have same name (column B). Now, I want to have all parameters for this galaxies in one table.
– Negar
19 mins ago