Long time listener first time poster. Hope someone can advise.
I have two files, 1000+ lines in each, two fields in each file.
After performing a sort, what is the best way to find exact matches where field $1 and $2 in file1 are also present in file2 on the same line, then output only those into file3?
Field 1 will always be unique within the files, but not field 2, there could be numerous entries of the same text.
So where field 1 and field 2 on a line in file 1, both only exist on the same line in file 2, output to file 3.
Thanks in advance.
File 1
Code:
abcdefgh name1
bcdefgha name2
nmrsthji namei
nmdherya wood
kasjfhsw moon
pqoweiru sun
wershgsy other
iundhstw tree
gfhskwyt mine
alskalak hoover
File 2
Code:
abcdefgh name1
bcdefgha name5
hjgdrnja namej
nmdherya notwood
kasjfhsw moon
wershgsy other
pqoweiru sun
gfhskwyt mine
alskalak hoover
--- Post updated at 02:25 PM ---
Confusing myself.
I dont mean field 1 and field 2 on line 3 in file 1, have to be on line 3 in file 2.
But field 1 and 2 on line 3, must match in file 2, on any line, then output to file 3.
Moderator's Comments:
Please use CODE tags as required by forum rules!
Last edited by RudiC; 01-24-2019 at 10:28 AM..
Reason: Added CODE tags.
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Discussion started by: sivarajb
1 Replies
LEARN ABOUT MOJAVE
lam
LAM(1) BSD General Commands Manual LAM(1)NAME
lam -- laminate files
SYNOPSIS
lam [-f min.max] [-s sepstring] [-t c] file ...
lam [-p min.max] [-s sepstring] [-t c] file ...
DESCRIPTION
The lam utility copies the named files side by side onto the standard output. The n-th input lines from the input files are considered frag-
ments of the single long n-th output line into which they are assembled. The name `-' means the standard input, and may be repeated.
Normally, each option affects only the file after it. If the option letter is capitalized it affects all subsequent files until it appears
again uncapitalized. The options are described below:
-f min.max
Print line fragments according to the format string min.max, where min is the minimum field width and max the maximum field width.
If min begins with a zero, zeros will be added to make up the field width, and if it begins with a `-', the fragment will be left-
adjusted within the field.
-p min.max
Like -f, but pad this file's field when end-of-file is reached and other files are still active.
-s sepstring
Print sepstring before printing line fragments from the next file. This option may appear after the last file.
-t c The input line terminator is c instead of a newline. The newline normally appended to each output line is omitted.
To print files simultaneously for easy viewing use pr(1).
EXAMPLES
The command
lam file1 file2 file3 file4
joins 4 files together along each line. To merge the lines from four different files use
lam file1 -S "
" file2 file3 file4
Every 2 lines of a file may be joined on one line with
lam - - < file
and a form letter with substitutions keyed by `@' can be done with
lam -t @ letter changes
SEE ALSO join(1), paste(1), pr(1), printf(3)STANDARDS
Some of the functionality of lam is standardized as the paste(1) utility by IEEE Std 1003.2 (``POSIX.2'').
BUGS
The lam utility does not recognize multibyte characters.
BSD August 12, 2004 BSD
01-24-2019
