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Full Discussion: Inserting a line when its length is variable
Top Forums Shell Programming and Scripting Inserting a line when its length is variable Post 302361030 by jp2542a on Monday 12th of October 2009 02:31:13 AM
Old 10-12-2009
Your definition is not very clear and test data very limited , but try this:

Code:
awk '(NR==FNR) {A=$1} (NR!=FNR) & (FNR != 28) {FS=","; print;} (NR!=FNR) & (FNR==28) { $2 = A/3 + 1; $NF=A; print}'  file1 file2

where file1 is the first file with the last line of interest and file 2 is the file with the line you want to replace.
 

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LEARN ABOUT SUSE

lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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