I have a very large file (10,000,000 lines), that contains a sample id and a property of that sample. I have another file that contains around 1,000,000 lines with sample ids that I want to remove from the original file (create a new file without these lines).
I know how to do this in Perl, but it... (9 Replies)
Dear all,
I need to search multiple patterns and then I need to print their respective next lines. For an example, in the below table, I will look for 3 different patterns :
1) # ATC_Codes:
2) # Generic_Name:
3) # Drug_Target_1_Gene_Name:
#BEGIN_DRUGCARD DB00001
# AHFS_Codes:... (3 Replies)
I have two files. The first containing a header and six columns of data.
Example file 1:
Number SNP ID dbSNP RS ID Chromosome Result_Call Physical Position
787066 SNP_A-8575395 RS6650104 1 NOCALL 564477
786872 SNP_A-8575125 RS10458597 1 AA ... (13 Replies)
I need to print out sections (varying numbers of lines) of a file between patterns. That alone is easy enough: sed -n '/START/,/STOP/' I also need the 3 lines BEFORE the start pattern. That alone is easy enough: grep -B3 START But I can't seem to combine the two so that I get everything between the... (2 Replies)
Hi,
I want to print only lines (green-italic lines) in between first and last strings in column 9.
there are different number of lines between each strings.
10 AUGUSTUS exon 4558 4669 . - . 10.g1
10 AUGUSTUS exon 8771 8889 . ... (6 Replies)
Hi Gurus,
I have a requirement where I need to display all lines between 2 patterns except the line where the first pattern in it. I tried the following command using awk but it is printing all lines except the lines where the 2 patterns exist.
awk '/TRANSF_/{ P=1; next } /Busy/ {exit} P'... (9 Replies)
Hi
I need to egrep patterns in a file and limit number of matches to print for each matched pattern.
-m10 option is not working out in my sun solaris 5.10
Please guide me the options to achieve.
if i do head -10 , i wont be getting all pattern match results as output since for a... (10 Replies)
In the awk below I am trying to output those lines that Match between file1 and file2, those Missing in file1, and those missing in file2. Using each $1,$2,$4,$5 value as a key to match on, that is if those 4 fields are found in both files the match, but if those 4 fields are not found then missing... (0 Replies)
Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" .
I have attached sample input file and the desired input should be as:
INPUT FORMAT:
SELECT
ABCD,
DEFGH,
DFGHJ,
JKLMN,
AXCVB,... (5 Replies)
Discussion started by: nani2019
5 Replies
LEARN ABOUT REDHAT
pcregrep
PCREGREP(1) General Commands Manual PCREGREP(1)NAME
pcregrep - a grep with Perl-compatible regular expressions.
SYNOPSIS
pcregrep [-Vcfhilnrsvx] pattern [file] ...
DESCRIPTION
pcregrep searches files for character patterns, in the same way as other grep commands do, but it uses the PCRE regular expression library
to support patterns that are compatible with the regular expressions of Perl 5. See pcre(3) for a full description of syntax and semantics.
If no files are specified, pcregrep reads the standard input. By default, each line that matches the pattern is copied to the standard out-
put, and if there is more than one file, the file name is printed before each line of output. However, there are options that can change
how pcregrep behaves.
Lines are limited to BUFSIZ characters. BUFSIZ is defined in <stdio.h>. The newline character is removed from the end of each line before
it is matched against the pattern.
OPTIONS -V Write the version number of the PCRE library being used to the standard error stream.
-c Do not print individual lines; instead just print a count of the number of lines that would otherwise have been printed. If sev-
eral files are given, a count is printed for each of them.
-ffilename
Read patterns from the file, one per line, and match all patterns against each line. There is a maximum of 100 patterns. Trailing
white space is removed, and blank lines are ignored. An empty file contains no patterns and therefore matches nothing.
-h Suppress printing of filenames when searching multiple files.
-i Ignore upper/lower case distinctions during comparisons.
-l Instead of printing lines from the files, just print the names of the files containing lines that would have been printed. Each
file name is printed once, on a separate line.
-n Precede each line by its line number in the file.
-r If any file is a directory, recursively scan the files it contains. Without -r a directory is scanned as a normal file.
-s Work silently, that is, display nothing except error messages. The exit status indicates whether any matches were found.
-v Invert the sense of the match, so that lines which do not match the pattern are now the ones that are found.
-x Force the pattern to be anchored (it must start matching at the beginning of the line) and in addition, require it to match the
entire line. This is equivalent to having ^ and $ characters at the start and end of each alternative branch in the regular
expression.
SEE ALSO pcre(3), Perl 5 documentation
DIAGNOSTICS
Exit status is 0 if any matches were found, 1 if no matches were found, and 2 for syntax errors or inacessible files (even if matches were
found).
AUTHOR
Philip Hazel <ph10@cam.ac.uk>
Last updated: 15 August 2001
Copyright (c) 1997-2001 University of Cambridge.
PCREGREP(1)