Delete 40 lines after every 24 lines from a file

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# 1  
Old 02-03-2014
Delete 40 lines after every 24 lines from a file


I have file of more than 10000 lines.

I want to delete 40 lines after every 20 lines.

e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on.

Please let me know how i can do it.

Best regards,
# 2  
Old 02-03-2014
The first deletion would start from line no 21 as per the logic !?
Or I misunderstood something? Please explain if possible with example.
# 3  
Old 02-03-2014
What about the first 14 lines? And is it 20 or 24 lines (see thread header)? And, 34 - 74 will be deleting 41 lines. Please improve your specification.
# 4  
Old 02-03-2014
First 14 lines has to be deleted. Actually no.s quoted by me can vary. As an e.g we can take that i want to print lines no 34-74 then 94-134 then 154 -174 and so on.

i.e. i want to print fixed length of lines (here 21) every time after deleting fixed length of lines (here 39)...

Hope i am able to clarify.
# 5  
Old 02-04-2014
Delete lines 34-74 then 94-134 then 154 -174 and so on, you mean? And first 14 lines?
Then 15-33 would remain and 75-93 and 135-153, i.e. 19 lines every time...
awk '!((NR-s)%m),!((NR-s-p+1)%m)' s=15 m=60 p=19 file

You get the idea. I used parameters so you can twiddle the knobs..

Last edited by Scrutinizer; 02-04-2014 at 02:32 AM..
# 6  
Old 02-04-2014
Can you please describe how it is working?
# 7  
Old 02-04-2014
Does it work for you?
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