I wish I could learn AWK, I know it's really powerful. I've coded in many different languages and can usually work out what stuff does, but AWK is so cryptic!
I'm looking at what you posted trying to understand. If you're up giving me a little tutorial, I'd love to understand.
Where does p1 come from?
Is prev a built-in variable?
Code:
# While NR (number of records) is not equal to 1 and p1 is not equal to the first field (the ID)
NR!=1 && p1!=$1
# Print the line and append a null so the line will join with the next
{print prev;prev=""}
# p1 gets the value of the ID field
{p1=$1;
# This is a bit cryptic, but it looks like you're assigning/merging the contents
# of previous line with the next one and stripping the first field??
prev=(prev"")?prev FS substr($0,index($0,$2)):$0}
# Also a bit cryptic, but guessing we've reached the EOF and spitting out what's left?
END{if(prev"") print prev}'
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Hi,
I have a tab delimited flat file like this: 189 Guide de lutilisateur sur lappel conférence à trois au moyen d'adaptateurs téléphoniques <TABLE><TBODY><TR><TD><DIV class=subheader>La fonction Appel conférence à trois </DIV></TD>
\
<TD><?php print $navTree;?> vous permet de tenir un appel... (4 Replies)
I've hunted and hunted but nothing seems to apply to what I need. Any help will be much appreciated!
My input file looks like (Unix):
marker,allele1,allele2
RS1002244,1,1
RS1002244,1,3
RS1002244,3,3
RS1003719,2,2
RS1003719,2,4
RS1003719,4,4
Most markers are listed 3 times but a few... (2 Replies)
Hi All,
I have working (Perl) code to combine 2 input files into a single output file using the join function that works to a point, but has the following limitations:
1. I am restrained to 2 input files only.
2. Only the "matched" fields are written out to the "matched" output file and... (1 Reply)
Hi Guys,
After windows died on my netbook I installed Lubuntu and discovered Gawk about a month ago. After using Excel for 10+ years I'm amazed how quick and easily Gawk can process data but I'm stuck with a little problem merging data from multiple lines.
I'm an SEO Consultant and provide... (9 Replies)
I have 100 data files labelled 250.1.txt through 250.100.txt. The second column of the data files partially match (there is about %90 overlap). Each data file has 4 columns.
I want the merge all these text files by the matching values in the second column. In the output, the first column should... (1 Reply)
Hi all,
Say i have multiple files x1 x2 x3 x4, all with common header (date, time, year, age),,
How can I merge them to one singe file "X" in shell scripting
Thanks for your suggestions. (2 Replies)
Hi, I am trying to selectively merge two files based on keys reported in the 1st column.
File1:
#file1-header1
file1-header2
111 qwe rtz uio
198 asd fgh jkl
165 yxc
789 poi uzt rew
89 lkj
File2:
#file2-header2
file2-header2
165 ghz nko2 ... (2 Replies)
Join and merge multiple files with duplicate key and fill void columns
Hi guys,
I have many files that I want to merge:
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv: (5 Replies)
Discussion started by: yjacknewton
5 Replies
LEARN ABOUT CENTOS
tzselect
TZSELECT(8) Linux System Administration TZSELECT(8)NAME
tzselect - select a timezone
SYNOPSIS
tzselect
DESCRIPTION
The tzselect program asks the user for information about the current location, and outputs the resulting timezone description to standard
output. The output is suitable as a value for the TZ environment variable.
All interaction with the user is done via standard input and standard error.
EXIT STATUS
The exit status is zero if a timezone was successfully obtained from the user, nonzero otherwise.
ENVIRONMENT
AWK Name of a Posix-compliant awk program (default: awk).
TZDIR Name of the directory containing timezone data files (default: /usr/share/zoneinfo).
FILES
TZDIR/iso3166.tab
Table of ISO 3166 2-letter country codes and country names.
TZDIR/zone.tab
Table of country codes, latitude and longitude, TZ values, and descriptive comments.
TZDIR/TZ
Time zone data file for timezone TZ.
SEE ALSO tzfile(5), zdump(8), zic(8)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2007-05-18 TZSELECT(8)