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Shell Programming and Scripting
merge two files with awk
Post 302707997 by xshang on Sunday 30th of September 2012 09:15:51 PM
09-30-2012
Quote:
It later crossed my mind that it could be reduced a bit further still:The fields in file2 cover some fields in file1's in output, however, the value of "NF" show the right number. Confused.
Besides, what should I do if I want to change the position of file1 and file2?
I try the following code but it don't work.
Code:
awk 'NR==FNR{A[$1]=$0; next} $1=A[$1]' file2 FS='\t' OFS=, file1Last edited by xshang; 09-30-2012 at 11:36 PM..
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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)