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Shell Programming and Scripting
Reading first column of file which start with space also
Post 302838187 by ryandegreat25 on Monday 29th of July 2013 05:26:13 AM
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1. Shell Programming and Scripting
I am trying to read in a 2 column data file into Perl Hash array index. Here is my code.
#!/usr/bin/perl -w
use strict;
use warnings;
my $file = "file_a";
my @line = ();
my $index = 0;
my %ind_file = ();
open(FILE, $file) or die($!);
while(<FILE>) {
chomp($_);
if ($_ eq '')
{
... (1 Reply)
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Hi Everyone!
I have a problem in reading a specific column from .xls file using perl language and then manipulating on given criteria.
Detailed Description of the problem::
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How to avoid the truncating of multiple spaces into a single space while reading a line from a file?
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do
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sadasdasdasdsa erwerewrwr ergdgdfgf rgerg erwererwr
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Hi,
For my reuirement, I have to read a file from the 2nd line till the last line<EOF>.
Say,
I have a file as test.txt, which as a header record in the first line followed by records in rest of the lines.
for i in `cat test.txt`
{
echo $i
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I have a space delimited text file with two columns. I would like to add NA to the first column of the text file.
Input:
19625 10.4791768259
19700 10.8146489183
19701 10.9084026759
19702 10.9861346978
19703 10.9304364984
Output:
NA19625 10.4791768259
NA19700 10.8146489183... (1 Reply)
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Hi,
I am not so familiar with bash scripting and would appreciate your help here.
I have a text file 'input.txt' like this:
2 3 4
5 6 7
8 9 10
I want to store each column in an array like this
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LEARN ABOUT CENTOS
cut
CUT(1) User Commands CUT(1) NAME
cut - remove sections from each line of files SYNOPSIS
cut OPTION... [FILE]... DESCRIPTION
Print selected parts of lines from each FILE to standard output. Mandatory arguments to long options are mandatory for short options too. -b, --bytes=LIST select only these bytes -c, --characters=LIST select only these characters -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST select only these fields; also print any line that contains no delimiter character, unless the -s option is specified -n with -b: don't split multibyte characters --complement complement the set of selected bytes, characters or fields -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter --help display this help and exit --version output version information and exit Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Selected input is written in the same order that it is read, and is written exactly once. Each range is one of: N N'th byte, character or field, counted from 1 N- from N'th byte, character or field, to end of line N-M from N'th to M'th (included) byte, character or field -M from first to M'th (included) byte, character or field With no FILE, or when FILE is -, read standard input. GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cut translation bugs to <http://translationproject.org/team/> AUTHOR
Written by David M. Ihnat, David MacKenzie, and Jim Meyering. COPYRIGHT
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for cut is maintained as a Texinfo manual. If the info and cut programs are properly installed at your site, the command info coreutils 'cut invocation' should give you access to the complete manual. GNU coreutils 8.22 June 2014 CUT(1)