missing number from two squence

Question

How do I findout missing number from two sequence using bash script

from example I have file which contain following data

output : missing numbers are

1 4
2 2
2 4

If the sequence starts with `1 2` do you consider `1 1` is missing? or if it starts with `2 1` ? — a5hk, Apr 28 '14 at 06:07

score 3 · Answer 1 · answered Apr 28 '14 at 06:17

3

This awk one-liner gives the requested output for the specified input:

$ awk '$2!=l2+1&&$1==l1{for(i=l2+1;i<$2;i++)print l1,i}{l1=$1;l2=$2}' file
1 4
2 2
2 4

answered Apr 28 '14 at 06:17

user000001

score 2 · Answer 2 · answered Apr 29 '14 at 11:41

2

a solution using grep:

printf "%s\n" {1..2}" "{1..5} | grep -vf file

answered Apr 29 '14 at 11:41

Farvardin

2

Now I see where [your question](http://stackoverflow.com/q/23363003/1983854) came from :) – fedorqui Apr 29 '14 at 13:52

2 Answers2