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Top Forums Shell Programming and Scripting Match and print columns in second file Post 302627525 by birei on Friday 20th of April 2012 04:59:52 PM
Old 04-20-2012
Hi newpro,

One way:
Code:
$ cat file1
X1
X3
X4
$ cat file2
ID      X1      X2      X3      X4
A       1       6       2       1
B       2       7       3       3
C       3       8       4       1
D       4       9       1       1
$ cat script.awk 
BEGIN { 
        OFS = "\t" 
} 

FNR == NR { 
        f1[ $1 ] = 1
        next
} 

FNR < NR && FNR == 1 { 
        for ( i = 1; i <= NF; i++ ) { 
                if ( f1[ $i ] ) { 
                        header = header i 
                } 
        }
}

{ 
        for ( i = 1; i <= NF; i++ ) {
                if ( index( header, i ) > 0 ) {
                        printf $i OFS
                }
        }
        printf ORS
} 
$ awk -f script.awk file1 file2
X1      X3      X4
1       2       1
2       3       3
3       4       1
4       1       1

This User Gave Thanks to birei For This Post:
 

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BZEXE(1)						      General Commands Manual							  BZEXE(1)

NAME
bzexe - compress executable files in place SYNOPSIS
bzexe [ name ... ] DESCRIPTION
The bzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``bzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
bzip2(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
bzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. BZEXE(1)
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