I'm sure it is a basic question but I didn't find any threads that fit my need.
How to remove empty fields with awk?
Or in other words, how to shift all the fields after an empty field on the left?
input:
wanted:
I tried:
and obtained,
I think the problem is I need to know the position of the empty field first, and then apply the condition to the next fields !
Hi
I have a file which looks like this
name: Sally group: Group4
name: Tim group: Group1
name: Dan group: Group2
name: Chris group: Group3
name: Peter group:
name: Fred group:
name: Mary group: Group2
Well I want to get rid of the... (4 Replies)
Hi Guys,
I wanted to count the number of records for a particular field of a file. whose fields are separated by comma","
I fI use this command.
cat "filename" cut -sd "," -f13 | wc -l
This shows all the lines count including the blank values for the field number 13. I wanted to count... (2 Replies)
I was just looking at this post: https://www.unix.com/shell-programming-scripting/22893-delete-multiple-empty-lines.html.
and I am looking to achieve the same with sed. So the idea is to delete lines from a file where a certain field has no value.
Inputfile:
EMID MMDDYY HOURS JOB EMNAME
0241... (4 Replies)
I have this
text.filecharles darwin sam delight
george washington johnson culper
darwin sam delight
micheal jackson penny lite and would like to remove the row, if the first field is blank. so the result would be:
result.filecharles darwin sam ... (4 Replies)
Hi ! programmers
I have a need of detecting empty field in file
my file looks like this
40.900|-71.600|1.6|20|1|1961|21.00|3.700||1|US|28035|10029370|31
40.900|-71.600|5.7|20|1|1961|21.00|3.700||1|US|28035|10029370|31
40.900|-71.600|7.8|20|1|1961|21.00|3.700||1|US|28035|10029370|31... (7 Replies)
Hi all,
I want to remove empty field in a text file. I tried to used sed. But it failed.
Input:
LG10_PM_map_19_LEnd 1000560 G AG AG
LG10_PM_map_19_LEnd 1005621 G AG
LG10_PM_map_19_LEnd 1011214 A AG AG
LG10_PM_map_19_LEnd 1011673 T CT CT ... (3 Replies)
Hi all,
I've got a file that has 12 fields. I've merged 2 files and there will be some duplicates in the following:
FILE:
1. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100
2. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, (EMPTY)
3. CDC, 54321, TEST3,... (4 Replies)
Discussion started by: tugar
4 Replies
LEARN ABOUT 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 /adm/users | join -t: -a 1 -e "" - bdays
Add birthdays to password information, leaving unknown birthdays empty. The layout of is given in users(6); bdays contains sorted
lines like
tr : ' ' </adm/users | 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
/sys/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)