Is there a command in unix to find the union of two files and removing the union from one of the files?
e.g. I have two files input1.txt and input2.txt with the contents below:
$ more input1.txt
4
2
3
2
$ more input2.txt
5
4
4
8
2
I want to find the union of the two and... (7 Replies)
Given two files of the same format (For example number1|text1|number2) what is the command to print lines in file1 which do not occur in file2? diff command seems a bit complicated for me for this purpose. Please help!! Thank you very much. (3 Replies)
Hi,
A piece of script from Perl-cookbook I do not understand, and post here for explanation.
The purpose is to find the element in either array (union), and in both array (intersection). Thank you in advance.
@a=qw(1 3 5 6 7 8);
@b=qw(2 3 5 7 9);
foreach $e (@a, @b) {$union{$e}++ &&... (3 Replies)
My concept may sound a bit cryptic but I what some startup information as to how we can use GDB APIs / debugging techniques in programs with GCC when we compile the program. We can definitely tell gcc to link GDB libs also. The ultimate aid would be that when the compiled programs executes it... (4 Replies)
Hi I have 2 files; usually the end position in the file1 is the start position in the file2 and the end position in file2 will be the start position in file1 (flanks)
file1
Id start end
aaa1 0 3000070
aaa1 3095270 3095341
aaa1 3100822 3100894
aaa1 ... (1 Reply)
I have 2 files; file 1 having smaller positions that overlap with the positions with positions in file2.
file1
aaa 20 22 apple
aaa 18 25 banana
aaa 12 30 grapes
aaa 22 25 melon
file2
aaa 18 26 cdded
aaa 10 35 abcde
I want to get something like this
output
aaa 18 26 cdded banana... (4 Replies)
Hi all,
I have a file like this I want to extract only those regions which are big and continous
chr1 3280000 3440000
chr1 3440000 3920000
chr1 3600000 3920000 # region coming within the 3440000 3920000. so i don't want it to be printed in output
chr1 3920000 4800000
chr1 ... (2 Replies)
Discussion started by: amrutha_sastry
2 Replies
LEARN ABOUT DEBIAN
plan9-join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If one of the file names is the
standard input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Input fields are normally separated spaces or tabs; output fields by space. In this case, multiple separators count as one, and leading
separators are discarded.
The following options are recognized, with POSIX syntax.
-a n In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-v n Like -a, omitting output for paired lines.
-e s Replace empty output fields by string s.
-1 m
-2 m Join on the mth field of file1 or file2.
-jn m Archaic equivalent for -n m.
-ofields
Each output line comprises the designated fields. The comma-separated field designators are either 0, meaning the join field, or
have the form n.m, where n is a file number and m is a field number. Archaic usage allows separate arguments for field designators.
-tc Use character c as the only separator (tab character) on input and output. Every appearance of c in a line is significant.
EXAMPLES
sort /etc/passwd | join -t: -1 1 -a 1 -e "" - bdays
Add birthdays to the /etc/passwd file, leaving unknown birthdays empty. The layout of /adm/users is given in passwd(5); bdays con-
tains sorted lines like
tr : ' ' </etc/passwd | sort -k 3 3 >temp
join -1 3 -2 3 -o 1.1,2.1 temp temp | awk '$1 < $2'
Print all pairs of users with identical userids.
SOURCE
/src/cmd/join.c
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b -ky,y; with -t, the sequence is that of sort -tx -ky,y.
One of the files must be randomly accessible.
JOIN(1)