08-15-2011
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a large csv file that looks like this:
The 3rd field is a unix time stamp that I want to convert to human readable.
I wrote a bash script with this code:
IFS=$','
cat $1 | while read ID user DATE text flags read; do
echo -e "$ID,$user,$(date -d @$DATE),$text,$flags,$read... (3 Replies)
Discussion started by: stumpyuk
3 Replies
2. Shell Programming and Scripting
Dear All,
1.txt (tab in between each value in a line)
a b c
a b c
a c d
you can see below, why with ~ i can output with tab, but = cannot?
# awk -F'\t' '$2 ~ /b/' 1
a b c
a b c
# awk -F'\t' '$2 = "b"' 1
a b c
a b c
a b d
... (1 Reply)
Discussion started by: jimmy_y
1 Replies
3. UNIX for Dummies Questions & Answers
Hi
I have a asterisk (*) delimited file and there are some fields which contain data having asterisk , now i want to double quote the fileds which contain data with asterisk
Ex:
input file
ID*NAME*EMAIL
1*BILL*BILL@AOL.com
2*J*OY*JOY@msn.com
in the 2nd record JOY has a asterisk value in... (11 Replies)
Discussion started by: halmstad
11 Replies
4. Shell Programming and Scripting
Hi,
Is there any short method to print from a particular field till another filed using awk?
Example File:
File1
====
1|2|acv|vbc|......|100|342
2|3|afg|nhj|.......|100|346
Expected output:
File2
====
acv|vbc|.....|100
afg|nhj|.....|100 (8 Replies)
Discussion started by: machomaddy
8 Replies
5. Shell Programming and Scripting
I have an awk script to find the maximum value of the 2nd column of a 2 column datafile, but I need to find the top 5 maximum values of the 2nd column.
Here is the script that works for the maximum value.
awk 'BEGIN { subjectmax=$1 ; max=0} $2 >= max {subjectmax=$1 ; max=$2} END {print... (3 Replies)
Discussion started by: ncwxpanther
3 Replies
6. Shell Programming and Scripting
How do I do the product of nth filed just like sum. For sum I know like
awk '{ sum += $12 } END {printf "%.2f\n", sum}'
works as initial sum = 0.
But for product how do initialize the variable to 1? (2 Replies)
Discussion started by: madhavb
2 Replies
7. Shell Programming and Scripting
I have a need to print nth field based on the parameter passed. Suppose I have 3 fields in a file, passing 1 to the function should print 1st field and so on.
I have attempted below function but this throws an error due to incorrect awk syntax.
function calcmaxlen
{
FIELDMAXLEN=0
... (5 Replies)
Discussion started by: krishmaths
5 Replies
8. Shell Programming and Scripting
We have a csv file as mentioned below and the requirement is to change the date format in file as mentioned below.
Current file (file.csv)
----------------------
empname,date_of_join,dept,date_of_resignation
ram,08/09/2015,sales,21/06/2016
"akash,sahu",08/10/2015,IT,21/07/2016
... (6 Replies)
Discussion started by: gopal.biswal
6 Replies
9. UNIX for Beginners Questions & Answers
I cannot seem to get what should be a simple awk one-liner to work correctly and cannot figure out why. I would like to use patterns from a specific field in one file as regex to search for matching strings in the entire line ($0) of another file.
I would like to output the lines of File2 which... (1 Reply)
Discussion started by: jvoot
1 Replies
10. Shell Programming and Scripting
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies
IGAWK(1) Utility Commands IGAWK(1)
NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO
gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)