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Full Discussion: Compare multiple fields in file1 to file2 and print line and next line
Top Forums Shell Programming and Scripting Compare multiple fields in file1 to file2 and print line and next line Post 302297472 by gillesc_mac on Friday 13th of March 2009 02:12:41 PM
Old 03-13-2009
Compare multiple fields in file1 to file2 and print line and next line
Hello,

I have two files that I need to compare and print out the line from file2 that has the first 6 fields matching the first 6 fields in file1. Complicating this are the following restrictions

1. file1 is only a few thousand lines at most and file2 is greater than 2 million
2. I need to match the first 6 fields (in order) of each line in file1 to the first 6 fields (in order) in a line in file2 and print the matched line from file2 along with the next line in file2.

Example files

file1:

...
0.54 3.2 0.45 32.9 4 0.02 9.0 4.0 (line 364)
0.6 4.0 3.99 2.0 0.85 7.0 3.84 0.05 (line 365)
...

file2:

93 28 04 73 95 11 0.4 7.9 2.30 4.05 (100(f18.3)) (line 30046)
70.1 99.4 0.35 9.943 6.1 0.27 0.654 (line 30047)
0.54 3.2 0.45 32.9 4 0.02 9.0 4.0 (54(f18.3) (line 628450)
44.8 33.2 90.3 45.2 66.3 (line 628451)

Needed result matches line 364 from file1 to line 628450 from file2 and prints lines 628450 and 628451, then goes to line 365 of file1 and searches file2 for a match to print matching first line and necessary second line from file2

Example partial output matching file1 with file2

0.54 3.2 0.45 32.9 4 0.02 9.0 4.0 (54(f18.3)
44.8 33.2 90.3 45.2 66.3

I don't really care what I use, awk, sed, perl, etc. I just need it to work.

Hopefully this make sense.

Thanks

Chris
 

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LEARN ABOUT OPENSOLARIS

comm

comm(1) 							   User Commands							   comm(1)

NAME

       comm - select or reject lines common to two files

SYNOPSIS

       comm [-123] file1 file2

DESCRIPTION

       The comm utility reads file1 and file2, which must be ordered in the current collating sequence, and produces three text columns as output:
       lines only in file1; lines only in file2; and lines in both files.

       If the input files were ordered according to the collating sequence of the current locale, the lines  written  will  be	in  the  collating
       sequence of the original lines. If not, the results are unspecified.

OPTIONS

       The following options are supported:

       -1    Suppresses the output column of lines unique to file1.

       -2    Suppresses the output column of lines unique to file2.

       -3    Suppresses the output column of lines duplicated in file1 and file2.

OPERANDS

       The following operands are supported:

       file1	A path name of the first file to be compared. If file1 is -, the standard input is used.

       file2	A path name of the second file to be compared. If file2 is -, the standard input is used.

USAGE

       See largefile(5) for the description of the behavior of comm when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

EXAMPLES

       Example 1 Printing a list of utilities specified by files

       If file1, file2, and file3 each contain a sorted list of utilities, the command

	 example% comm -23 file1 file2	| comm -23 - file3

       prints a list of utilities in file1 not specified by either of the other files. The entry:

	 example% comm -12 file1 file2 | comm -12 - file3

       prints a list of utilities specified by all three files. And the entry:

	 example% comm -12  file2 file3 | comm -23 -file1

       prints a list of utilities specified by both file2 and file3, but not specified in file1.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions  of  the  following  environment  variables that affect the execution of comm: LANG, LC_ALL, LC_COLLATE,
       LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0     All input files were successfully output as specified.

       >0    An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.11							    3 Mar 2004								   comm(1)
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