Yes, true - but this works only with GNU-grep, not with a standard-(POSIX-) grep because "-B" is not a POSIX-switch.
It is a hard lesson one learns in administrating very diverse large datacenters that in order to avoid "bad surprises" one sticks as close to the standards as possible. Otherwise you have to develop not "a script" but one for AIX this version, one for AIX that version, one completely different for HP-UX, another one for Solaris, several dozens for the various Linuxes....
Not that following the standards rules out bad surprises anyway, mind you, which is another hard lesson....
I hope this helps.
bakunin
These 2 Users Gave Thanks to bakunin For This Post:
Hi ,
I have a peculiar case, where my sed command is working on a file which contains lines of small length.
sed "s/XYZ:1/XYZ:3/g" abc.txt > xyz.txt
when abc.txt contains lines of small length(currently around 80 chars) , this sed command is working fine.
when abc.txt contains lines of... (3 Replies)
My files look like this
And I need to cut the sequences at the last "A" found in the following 'pattern' -highlighted for easier identification, the pattern is the actual file is not highlighted.
The expected result should look like this
Thus, all the sequences would end with AGCCCTA... (2 Replies)
This is what I would like to accomplish, I have an input file (file A) that consist of thousands of sequence elements with the same number of characters (length), each headed by a free text header starting with the chevron ‘>' character followed by the ID (all different IDs with different lenghts)... (9 Replies)
My file looks something like this
Wnat I need is to look for the Reference sequence (">Reference1") and based on the length of that sequence trim all the entries in that file. So, the rersulting file will contain all sequences with the same length, like this
Thus, all sequences will keep... (5 Replies)
Hi,
I have a file with more than 28000 records and it looks like below..
>mm10_refflat_ABCD range=chr1:1234567-2345678
tgtgcacactacacatgactagtacatgactagac....so on
>mm10_refflat_BCD range=chr1:3234567-4545678...
tgtgcacactacacatgactagtatgtgcacactacacatgactagta
.
.
.
.
.
so on
... (2 Replies)
I have a fastq file from small RNA sequencing with sequence lengths between 15 - 30. I wanted to filter sequence lengths between 21-25 and write to another fastq file. how can i do that? (4 Replies)
I have two files with thousands of sequences of different lengths. infile1 contains the actual sequences and infile2 the scores for each A, T, G and C in infile1. Something like this:
infile1:
>HZVJKYI01ECH5R
TTGATGTGCCAGCTGCCGTTGGTGTGCCAA
>HZVJKYI01AQWJ8
GGATATGATGATGAACTGGTTTGGCACACC... (4 Replies)
I have to remove sequences from a file based on the distance value. I am attaching the file containing the distances (Distance.xls)
The second file looks something like this:
Sequences.txt
>Sample1 Freq 59
ggatatgatgatgaactggt
>Sample1 Freq 54
ggatatgatgttgaactggt
>Sample1 Freq 44... (2 Replies)
I have a list of IDs in file1 and a list of sequences in file2. I can print sequences from file2, but I'm asking for help in printing the sequences in the same order as the IDs appear in file1.
file1:
EN_comp12952_c0_seq3:367-1668
ES_comp17168_c1_seq6:1-864
EN_comp13395_c3_seq14:231-1088... (5 Replies)
I could calculate the length of entire fasta sequences by following command,
awk '/^>/{if (l!="") print l; print; l=0; next}{l+=length($0)}END{print l}' unique.fasta
But, I need to calculate the length of a particular fasta sequence specified/listed in another txt file. The results to to be... (14 Replies)
Discussion started by: dineshkumarsrk
14 Replies
LEARN ABOUT V7
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)