sorry if you think that way. You have started many before and gotten many tips about shell scripting such as this one. Also this question is very easily solved, so its not unreasonable to ask you to demonstrate what you have learnt so far.
Hello all,
I have a data file that needs some serious work...I have no idea how to implement the changes that are needed!
The file is a genotypic file with >64,000 columns representing genetic markers, a header line, and >1100 rows that looks like this:
ID 1 2 3 4 ... (7 Replies)
I have a file that has been partially recoded so that data points that were formerly letter combinations are now -1, 0, or 1. I need to finish recoding the GG and CC data points. The file looks like this:
ID 1 2 3 4 5 6 7 8
83845676 0 0 0 0 CC -1 CC CC
838469. -1 -1 1 GG CC 0 CC 1
83847041... (10 Replies)
hiii, Help me out..i have a huge set of data stored in a file.This file has has 2 columns which is latitude & longitude of a region. Now i have a program which asks for the number of points & based on this number it asks the user to enter that latitude & longitude values which are in the same... (7 Replies)
Hi,
I am trying to arrange my graphs with GNUPLOT. Although it looked like simple at the beginning, I could not figure out an answer for the following: I want to change the style of my data points (not the line, just exact data points) The terminal assigns first + and then x to them but what I... (0 Replies)
Hi,
I have a file with one column data (sample below) and I am trying to write a shell script to calculate the difference between consecutive data valuse i.e
Var = Ni -N(i-1)
0.3141
-3.6595
0.9171
5.2001
3.5331
3.7022
-6.1087
-5.1039
-9.8144
1.6516
-2.725
3.982
7.769
8.88 (5 Replies)
Hi, I need help on finding the value of my data that encompasses certain percentage of my total data points (n). Attached is an example of my data, n=30. What I want to do is for instance is find the minimum threshold that still encompasses 60% (n=18), 70% (n=21) and 80% (n=24).
manually to... (4 Replies)
I have a text file that shows the output of my solar inverters. I want to separate this into sections. overview , device 1 , device 2 , device 3. Each device has different number of lines. but they all have unique starting points. Overview starts with 6 #'s, Devices have 4#'s and their data starts... (6 Replies)
I have 3 block data with Process Beginning and Process Ending
I need to Print Begining and ending lines of block data other than sqlExtracts blocks
Process Beginning - 2016-04-02-00.36.13---->Print this line
Putting Files To daADadD for File will move to /sadafJJHFASJFFASJ/
Extract... (8 Replies)
I need to rank a large number of data points that exist in multiple files. My data points (Column 3) are based on unique values in columns 1 and 2. I need to rank the values that are in File 1, Column 3.
For instance:
Input File 1
AAA BBB 10
CCC DDD 16
EEE FFF 20
Input File 2
... (47 Replies)
Discussion started by: ncwxpanther
47 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)