sed to conditionally delete multiple lines Post: 302532917

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Top Forums Shell Programming and Scripting sed to conditionally delete multiple lines Post 302532917 by jossojjos on Wednesday 22nd of June 2011 11:17:20 AM

06-22-2011

Registered User

sed to conditionally delete multiple lines

Hello

I'd like to remove any line in an output file that is preceded by one or more warning messages (each warning is on a separate line).

Example :

Code:

WARNING: Estimation of lower confidence limit of \rho failed; setting it to 0.
822     28447                                                                   1.51e+05        0.00e+00<-8.66e-04<9.52e-03
WARNING: Estimation of lower confidence limit of \rho failed; setting it to 0.
823     28343                                                                   1.50e+05        0.00e+00<-8.82e-04<1.97e-02
WARNING: Estimation of lower confidence limit of \rho failed; setting it to 0.
WARNING: Estimation of upper confidence limit of \rho failed; setting it to 1.
824     28246                                                                   1.50e+05        0.00e+00<-5.84e-04<1.21e-03

All these lines should be deleted ; there can be more than 2 warnings, in which case the output line should be deleted as well.

A command like

Code:

sed '/WARNING/{N; //d}' SlFf.rho2

doesn't work for even numbers of warning messages.

I'm not familiar enough to the n, N, d, and D commands to figure out their behaviour. Any ideas ?

Thanks
jos

jossojjos

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LEARN ABOUT PHP

g3cat

g3cat(1)						       mgetty+sendfax manual							  g3cat(1)

NAME

       g3cat - concatenate multiple g3 documents

SYNOPSIS

       g3cat [-l] [-a] g3-file1 ...

DESCRIPTION

       g3cat  concatenates  g3	files.	These can either be 'raw', that is, bitmaps packed according to the CCITT T.4 standard for one-dimensional
       bitmap encoding, or 'digifax' files, created by GNU's GhostScript package with the digifax drivers. Its output is a  concatenation  of  all
       the input files, in raw G3 format, with two white lines in between.

       If a - is given as input file, stdin is used.

       If the input data is malformed, a warning is printed to stderr, and the output file will have a blank line at this place.

OPTIONS

       -l     separate files with a one-pixel wide black line.

       -h <blank lines>
	      specifies the number of blank lines g3cat should prepend to each page. Default is 0.

       -L <lines>
	      limit lenght of output page to maximum <lines> lines.

SPECIAL-CASE OPTIONS
       -w <width>
	      specifies  the  desired  page width in pixels per line. Default is 1728 PELs, and this is mandatory if you want to send the fax to a
	      standard fax machine.  If one of the input files doesn't match this line width (for example because it was created by  a	broken	G3
	      creator), a warning is printed, and the line width is transparently fixed.

       -a     byte-align the end-of-line codes (EOL) in the file. Every EOL will end at a byte boundary, that is, with a  01 byte.

       -p <pad>
	      specifies a minimum number of bytes that each output line must be padded to.  Padding is done with 0-bits before the EOL code.

       -R     suppress output of end-of-page code (RTC).

Example
       The following example will put a header line on a given g3 page, 'page1' and put the result into 'page2':

       echo '$header' | pbmtext | pbm2g3 | g3cat - page1 >page2

FILES

       --

BUGS

       Hopefully none :-).

SEE ALSO

       g32pbm(1), sendfax(8), faxspool(1)

AUTHORS

       g3cat is Copyright (C) 1993 by Gert Doering, <gert@greenie.muc.de>

greenie 							     27 Oct 93								  g3cat(1)

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