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Full Discussion: Combining multiple files
Top Forums Shell Programming and Scripting Combining multiple files Post 302784795 by Don Cragun on Saturday 23rd of March 2013 05:27:00 AM
Old 03-23-2013
You could try something like:
Code:
awk '
FNR == 1 {   
        f[++fc] = FILENAME
        if(w[fc] < length(FILENAME)) w[fc] = length(FILENAME)
}
FNR == NR {
        d[++lc] = $1
        t[lc] = $2
}
{       v[fc,$1,$2] = $3
        if(w[fc] < length($3)) w[fc] = length($3)
}
END {   printf("    Date  Time")
        for(j = 1; j <= fc; j++)
                printf("%*s%s", w[j] + 1, f[j], j == fc ? "\n" : "")
        for(i = 1; i <= lc; i++) {
                printf("%s%6s", d[i], t[i])
                for(j = 1; j <= fc; j++)
                        printf("%*d%s", w[j] + 1, v[j, d[i], t[i]],
                                j == fc ? "\n" : "")
        }
}' FILE[12]

If you are running on a Solaris/SunOS system, use /usr/xpg4/bin/awk or nawk instead of awk.

Note that this script will work for two or more files, but the 1st file given must include all date/time pairs that you want to appear in the output.

With the FILE1 and FILE2 contents specified in the 1st message in this thread, the output produced by this script is:
Code:
    Date  Time FILE1 FILE2
20130322 05:35  2219   170
20130322 05:40  1809   169
20130322 05:45  1617   172
20130322 05:50  1359   171
20130322 05:55  2233     0
20130322 06:00  1648     0
20130322 06:05  1552   176

 

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