sed Range Pattern and 2 lines before Start Pattern
Hi all,
I have been searching all over Google but I am unable to find a solution for a particular result that I am trying to achieve.
Consider the following input:
I would like to extract 2 lines (these 2 lines can be different) above "Srt" (fixed) till "End"(fixed).
Desired output:
I understand that using the sed range pattern can help me on this.
However, the challenge that I am facing is that only "Srt" is fixed while the two lines above "Srt" always change, therefore I am unable to use them as a pattern. How do I modify the sed command such that I can include the two lines above "Srt", somewhat like grep -B2?
Please help on this.
Last edited by Don Cragun; 11-12-2015 at 05:25 AM..
Reason: Add CODE and ICODE tags.
Hi all,
I am using sed for extracting the lines that occurs between the 2 patterns using the following command:
sed -n '/pattern1/,/pattern2/' filename
The above command has no problem and works fine. But I was wondering if there is a way to quit sed when it has extracted the range at... (3 Replies)
This is my first post, please be nice. I have tried to google and read different tutorials.
The task at hand is:
Input file input.txt (example)
abc123defhij-E-1234jslo
456ujs-W-abXjklp
From this file the task is to grep the -E- and -W- strings that are unique and write a new file... (5 Replies)
Hi guys, trying to replace a '#' with a ' ' (space) but only between the brackets '(' and ')'
N="text1#text2#text3(var1#var2#var3)"
N=`echo $N |sed '/(/,/) s/#. //'`
echo $N
Looking for an output of "text1#text2#text3(var1 var2 var3)"
Any ideas? (15 Replies)
I've a file say having
line 1
line 2
(NP
line 3
line 4
line 5)
line 6
I want to combine lines starting from (NP and ending with ) then it will look like
line 1
line 2
(NP line3 line4 line5)
line 6
I tried using sed '/(NP/,/)$/ s/\n/ /' but it's not working. Any help please?
... (8 Replies)
Hi,
My input has much more lines, but few of them are below
pin(IDF) {
direction : input;
drc_pinsigtype : signal;
pin(SELDIV6) {
direction : input;
drc_pinsigtype : ... (3 Replies)
Hello sed gurus. I am using ksh on Sun and have a file created by concatenating several other files. All files contain header rows. I just need to keep the first occurrence and remove all other header rows.
header for file
1111
2222
3333
header for file
1111
2222
3333
header for file... (8 Replies)
Hi,
I have a file as below
This is the line one
This is the line two
<\XMLTAG>
This is the line three
This is the line four
<\XMLTAG>
Output of the SED command need to be as below.
This is the line one
This is the line two
<\XMLTAG>
Please do the need to needful to... (4 Replies)
'Hi
I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match.
Which option is to be used to exclude the line containing the pattern?
sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)
The intended result should be :
PDF converters
'empty line'
gpdftext and pdftotext?xml version="1.0"?>
xml:space="preserve"><note-content version="0.1" xmlns:/tomboy/link" xmlns:size="http://beatniksoftware.com/tomboy/size">PDF converters
gpdftext and pdftotext</note-content>... (9 Replies)
I have a file like below.
2018.07.01, Sunday
09:27 some text 123456789 0 21 0.06 0.07 0.00
2018.07.02, Monday
09:31 some text 123456789 1 41 0.26 0.32 0.00
09:39 some text 456789012 1 0.07 0.09 0.09
09:45 some text 932469494 1 55 0.29 0.36 0.00
16:49 some text 123456789 0 48 0.12 0.15 0.00... (9 Replies)
Discussion started by: father_7
9 Replies
LEARN ABOUT REDHAT
slagts
SLAGTS(l) ) SLAGTS(l)
NAME
SLAGTS - may be used to solve one of the systems of equations (T - lambda*I)*x = y or (T - lambda*I)'*x = y,
SYNOPSIS
SUBROUTINE SLAGTS( JOB, N, A, B, C, D, IN, Y, TOL, INFO )
INTEGER INFO, JOB, N
REAL TOL
INTEGER IN( * )
REAL A( * ), B( * ), C( * ), D( * ), Y( * )
PURPOSE
SLAGTS may be used to solve one of the systems of equations (T - lambda*I)*x = y or (T - lambda*I)'*x = y, where T is an n by n tridiagonal
matrix, for x, following the factorization of (T - lambda*I) as
(T - lambda*I) = P*L*U ,
by routine SLAGTF. The choice of equation to be solved is controlled by the argument JOB, and in each case there is an option to perturb
zero or very small diagonal elements of U, this option being intended for use in applications such as inverse iteration.
ARGUMENTS
JOB (input) INTEGER
Specifies the job to be performed by SLAGTS as follows:
= 1: The equations (T - lambda*I)x = y are to be solved, but diagonal elements of U are not to be perturbed. = -1: The equa-
tions (T - lambda*I)x = y are to be solved and, if overflow would otherwise occur, the diagonal elements of U are to be per-
turbed. See argument TOL below. = 2: The equations (T - lambda*I)'x = y are to be solved, but diagonal elements of U are not to
be perturbed. = -2: The equations (T - lambda*I)'x = y are to be solved and, if overflow would otherwise occur, the diagonal
elements of U are to be perturbed. See argument TOL below.
N (input) INTEGER
The order of the matrix T.
A (input) REAL array, dimension (N)
On entry, A must contain the diagonal elements of U as returned from SLAGTF.
B (input) REAL array, dimension (N-1)
On entry, B must contain the first super-diagonal elements of U as returned from SLAGTF.
C (input) REAL array, dimension (N-1)
On entry, C must contain the sub-diagonal elements of L as returned from SLAGTF.
D (input) REAL array, dimension (N-2)
On entry, D must contain the second super-diagonal elements of U as returned from SLAGTF.
IN (input) INTEGER array, dimension (N)
On entry, IN must contain details of the matrix P as returned from SLAGTF.
Y (input/output) REAL array, dimension (N)
On entry, the right hand side vector y. On exit, Y is overwritten by the solution vector x.
TOL (input/output) REAL
On entry, with JOB .lt. 0, TOL should be the minimum perturbation to be made to very small diagonal elements of U. TOL should
normally be chosen as about eps*norm(U), where eps is the relative machine precision, but if TOL is supplied as non-positive, then
it is reset to eps*max( abs( u(i,j) ) ). If JOB .gt. 0 then TOL is not referenced.
On exit, TOL is changed as described above, only if TOL is non-positive on entry. Otherwise TOL is unchanged.
INFO (output) INTEGER
= 0 : successful exit
element of the solution vector x. This can only occur when JOB is supplied as positive and either means that a diagonal element of
U is very small, or that the elements of the right-hand side vector y are very large.
LAPACK version 3.0 15 June 2000 SLAGTS(l)