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Top Forums Shell Programming and Scripting Inserting a line when its length is variable Post 302361016 by nxp on Monday 12th of October 2009 01:47:19 AM
Old 10-12-2009
Inserting a line when its length is variable

Hi Unix experts

I have simple text files in which the number of lines vary from one file to another. They look like the following:
Code:
#
#
.
.
 34    46 
 76    72
 39    68

I want to grab the first number of the last line of each file (let's say A= 39 in the above example), which is always a multiplication of 3, and insert a new line in the 28th line of another text file with the following format:


0, (A/3) +1, 0, 3,6,9,12,15,...,A

Where A can be a number between 3 and 54, so the number of fields in the line would be variable. Positions of zeros(0) in the line remain fixed. In case of A=39 the line lools like:

0, 14, 0,3,6,9,12,15,18,21,24,27,30,33,36,39

Any help is very much appreciated.

Regards
 
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VIEWPERL(1)							   User Commands						       VIEWPERL(1)

NAME
viewperl - quickly view syntax highlighted Perl code SYNOPSIS
viewperl [OPTION]... FILE... DESCRIPTION
View a Perl source code file, syntax highlighted. -c, --code=CODE view CODE, syntax highlighted -l, --lines display line numbers -L, --no-lines supress display of line numbers (default) -m, --module=FILE consider FILE the name of a module, not a file name -n, --name display the name of each file (default) -N, --no-name supress display of file names (implied by --no-reset) -p, --pod display inline POD documentation (default) -P, --no-pod hide POD documentation (line numbers still increment) -r, --reset reset formatting and line numbers each file (default) -R, --no-reset supress resetting of formatting and line numbers -s, --shift=WIDTH set tab width (default is 4) -t, --tabs translate tabs into spaces (default) -T, --no-tabs supress translating of tabs into spaces --help display this help and exit Note that module names should be given as they would appear after a Perl `use' or `require' statement. `Getopt::Long', for example. Each string given using -c is considered a different file, so line number and formatting resets will apply. View a Perl source code file, syntax highlighted. -c, --code=CODE view CODE, syntax highlighted -l, --lines display line numbers -L, --no-lines supress display of line numbers (default) -m, --module=FILE consider FILE the name of a module, not a file name -n, --name display the name of each file (default) -N, --no-name supress display of file names (implied by --no-reset) -p, --pod display inline POD documentation (default) -P, --no-pod hide POD documentation (line numbers still increment) -r, --reset reset formatting and line numbers each file (default) -R, --no-reset supress resetting of formatting and line numbers -s, --shift=WIDTH set tab width (default is 4) -t, --tabs translate tabs into spaces (default) -T, --no-tabs supress translating of tabs into spaces --help display this help and exit Note that module names should be given as they would appear after a Perl `use' or `require' statement. `Getopt::Long', for example. Each string given using -c is considered a different file, so line number and formatting resets will apply. viewperl August 2007 VIEWPERL(1)

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