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Thanks everybody for the interesting comments. It has helped me to try different options and get around the problem.

The values that I use for filtering is not fixed so I had to be cautious to use...

Hi,

I have a large number of input files with two columns of numbers.

For example:
[X] [Y]
83 1453
99 3255
99 8482
99 7372
83 175

I only wish to retain lines...

Thanks Franklin52

I saw you also posted this code which is more simple:
awk 'p{print $0-p}{p=$0}' file
So I am using this instead as I better understand what is happening as I did not really...

Hi all,

I have made at small script to make a simple calculation on a file which is formatted in this way:


I want to create a new file in which the value of particular line minus the previous...

Thanks. It worked. Yeah.
:)

Hi,

I have a file such as:
---
>contig00001 length=35524 numreads=2944
gACGCCGCGCGCCGCGGCCAGGGCTGGCCCA
CAGGCCGCGCGGCGTCGGCTGGCTGAG
>contig00002 length=4242 numreads=43423...

Hi, I am not sure what OP means?

Heps,
it works. And much much faster than 12 hours. I guess I need to pay more attendance to sed and awk...
Thanks

Hi, thanks for the responses. I tried both, however, I was giving an error message about the "!" ?

interaction[rlmn]:/home/projects/rlmn/sommerdata/run2> awk '!/^[@+]/{print...

Hi,

I have a file with four types of lines:

@HWUSI-EAS656_0022:8:1:175:376#0/1
CTCGACACGCTGGTGGAGATCCTCGGCCTGACCGAGGACGACCGGGCCATCTTCGAGCAGCGC
+...

Ok, this was my first post here and I have actually read the forum rules, so I would not post homework.
Anyway, I got past the problem now with help from other side.

Hello,

I have a text file with n lines in the following format (9 column fields):

Example:
contig00012 149606 G C 49 68 60 18 c$cccccacccccccccc^c

I...