Filling in gaps with awk or anything

Question

I have a list such as below, where the 1 column is position and the other columns aren't important for this question.

1  1 2 3 4 5
2  1 2 3 4 5
5  1 2 3 4 5
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5

I want to fill in the gaps such that the list is continuous and it reads

1  1 2 3 4 5
2  1 2 3 4 5
3  0 0 0 0 0
4  0 0 0 0 0 
5  1 2 3 4 5
6  0 0 0 0 0 
7  0 0 0 0 0 
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5

I am familiar with awk and shell scripts, but whatever way it can be done is fine with me. Thanks for any help..

Answer 1

this one-liner may work for you:

awk '$1>++p{for(;p<$1;p++)print p"  0 0 0 0 0"}1' file

with your example:

kent$  echo '1  1 2 3 4 5
2  1 2 3 4 5
5  1 2 3 4 5
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5'|awk '$1>++p{for(;p<$1;p++)print p"  0 0 0 0 0"}1'         
1  1 2 3 4 5
2  1 2 3 4 5
3  0 0 0 0 0
4  0 0 0 0 0
5  1 2 3 4 5
6  0 0 0 0 0
7  0 0 0 0 0
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5

Answer 2

You can use the following awk one-liner:

awk '{b=a;a=$1;while(a>(b++)+1){print(b+1)," 0 0 0 0 0"}}1' input.file

Tested with here-doc input:

awk '{b=a;a=$1;while(a>(b++)+1){print(b+1)," 0 0 0 0 0"}}1' <<EOF
1  1 2 3 4 5
2  1 2 3 4 5
5  1 2 3 4 5
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5
EOF

the output is as follows:

1  1 2 3 4 5
2  1 2 3 4 5
3  0 0 0 0 0
4  0 0 0 0 0
5  1 2 3 4 5
6  0 0 0 0 0
7  0 0 0 0 0
8  1 2 3 4 5
9  1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5

Explanation:

On every input line b is set to a where a is the value of the first column. Because of the order in which b and a are initialized, b can be used in a while loop that runs as long as b < a-1 and inserts the missing lines, filled up with zeros. The 1 at the end of the script will finally print the input line.

Answer 3

This is only for fun:

join -a2 FILE <(seq -f "%g 0 0 0 0 0" $(tail -1 FILE | cut -d' ' -f1)) | cut -d' ' -f -6

produces:

1 1 2 3 4 5
2 1 2 3 4 5
3 0 0 0 0 0
4 0 0 0 0 0
5 1 2 3 4 5
6 0 0 0 0 0
7 0 0 0 0 0
8 1 2 3 4 5
9 1 2 3 4 5
10 1 2 3 4 5
11 1 2 3 4 5