Swap two rows in a space delimited text file?

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1

Hi,

How do you swap two rows in a space delimited text file? Thanks!

2

Hi

Please post your sample input file and expected output file to give us some clarity.

Guru.

3

Input:

1334 NA12146 0 0 1 -9 G A A G C A G G 
1347 NA11882 0 0 2 -9 G A A G C A G G A
1340 NA07056 0 0 2 -9 G A A G A A G G 
1408 NA12154 0 0 1 -9 A A G G A A G G

Swap lines 2 and 3

Output:

1334 NA12146 0 0 1 -9 G A A G C A G G 
1340 NA07056 0 0 2 -9 G A A G A A G G 
1347 NA11882 0 0 2 -9 G A A G C A G G A
1408 NA12154 0 0 1 -9 A A G G A A G G
4

Hi

$ awk  'NR==2{x=$0;getline;print;$0=x;}1' file
1334 NA12146 0 0 1 -9 G A A G C A G G
1340 NA07056 0 0 2 -9 G A A G A A G G
1347 NA11882 0 0 2 -9 G A A G C A G G A
1408 NA12154 0 0 1 -9 A A G G A A G G

Guru.

5

@Guru, Can you explain above command