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Full Discussion: awk , conditional involving line and column
Top Forums Shell Programming and Scripting awk , conditional involving line and column Post 302602054 by ariesto on Saturday 25th of February 2012 08:19:23 PM
Old 02-25-2012
awk , conditional involving line and column
Dear All,

I indeed your help for managing resarch data file.

for example I have,

data1.txt :

type of atoms z vz
Si 34 54
O 20 56
H 14 13
Si 40 17
O 65 18
H 70 19
Si 24 20
H 85 21
O 90 12
Si 12 34

I want to extract O and H data using awk where its z value is bigger than maximum z value of Si (40).
that I hope I can data file, say data2.text:
type of atoms z vz
O 65 18
H 70 19
H 85 21
O 90 12

thank you in advance
with best regards,

---------- Post updated at 08:19 PM ---------- Previous update was at 08:13 PM ----------

sorry, once more, I also need the opposite one.
data3.test

Si 34 54
O 20 56
H 14 13
Si 40 17
Si 12 34
 

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LEARN ABOUT CENTOS

unsquashfs

UNSQUASHFS(1)						  uncompress squashfs filesystems					     UNSQUASHFS(1)

NAME

       mksquashfs - tool to uncompress squashfs filesystems

SYNOPSIS

       unsquashfs [OPTIONS] FILESYSTEM [directories or files to extract]

DESCRIPTION

       Squashfs  is  a	highly compressed read-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories.
       Inodes in the system are very small and all blocks are packed to minimize data overhead. Block sizes greater than 4K are supported up to  a
       maximum of 64K.

       Squashfs  is  intended for general read-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in con-
       strained block device/memory systems (e.g. embedded systems) where low overhead is needed.

OPTIONS

       -v, -version
	   print version, licence and copyright information.

       -d PATHNAME, -dest PATHNAME
	   unsquash to PATHNAME, default "squashfs-root".

       -n, -no-progress
	   don't display the progress bar.

       -no, -no-xattrs
	   don't extract xattrs in file system.

       -x, -xattrs
	   extract xattrs in file system (default).

       -p NUMBER, -processors NUMBER
	   use NUMBER processors. By default will use number of processors available.

       -i, -info
	   print files as they are unsquashed.

       -li, -linfo
	   print files as they are unsquashed with file attributes (like ls -l output).

       -l, -ls
	   list filesystem, but don't unsquash.

       -ll, -lls
	   list filesystem with file attributes (like ls -l output), but don't unsquash.

       -f, -force
	   if file already exists then overwrite.

       -s, -stat
	   display filesystem superblock information.

       -e EXTRACT_FILE, -ef EXTRACT_FILE
	   list of directories or files to extract. One per line.

       -da SIZE, -data-queue SIZE
	   Set data queue to SIZE Mbytes. Default 256 Mbytes.

       -fr SIZE, -frag-queue SIZE
	   Set fragment queue to SIZE Mbytes. Default 256 Mbytes.

       -r, -regex
	   treat extract names as POSIX regular expressions rather than use the default shell wildcard expansion (globbing).

   Decompressors available
       gzip

       lzo

       xz

SEE ALSO

       mksquashfs(1)

HOMEPAGE

       More information about unsquashfs and the squashfs filesystem can be found at <http://squashfs.sourceforge.net/>.

AUTHOR

       squashfs was written by Phillip Lougher <plougher@users.sourceforge.net>.

       This manual page was written by Daniel Baumann <daniel.baumann@progress-technologies.net>.

4.2								    2012-06-30							     UNSQUASHFS(1)
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