I've now tried this but it also doesn't add up the values properly nor print them in the right format. I suppose my approach isn't the way to go, it was simply the only thing I could think of doing. Is there a better approach to go at it?
strange... given you sample files and the script:
I get the desired result:
Can you run cat -vet on both files and post the corresponding output within code tags, please.
How do I add 4 columns to an excel file using Perl? The 4 headers for those columns will all have different names? Please help and I greatly appreciate... (1 Reply)
Hello everyone,
I have two files containing 6 columns and thousands of rows. I want to add them (i.e. first column of first file + first column of second file and so on) and print the output in a third file. Can you please help me.
Thanks a lot (7 Replies)
Hi everyone,
I got a problem with merging files and hoped one of you would have an idea how to approach this issue. I tried it with awk, but didn't get far. This is what I have:
I got 40 files looking like the ones below. All have three columns but the number of rows differs (20000 to 50000).... (6 Replies)
Dear all,
I have a question. I have a txt.file as below. i want to add 3 more columns: column3=conlum 2*column2; column4=(1-column2)*(1-column2); column5=1-column3-column4. Do you know how to do it? Thanks a lot!
file:
column1 column2
a 1
b 20
c 30
d 3
... (2 Replies)
I have a number of files with multiple rows that I need to add together.
Let say I have 10 files:
Each file has a great number of rows and columns. I need to add these files together the following way.
In other words, If, for example, file A occupies Columns 1 to 19, I want to add file B... (7 Replies)
Hello
I have a file as below
chr1 start ref alt code1 code2
chr1 18884 C CAAAA 2 0
chr1 135419 TATACA T 2 0
chr1 332045 T TTG 0 2
chr1 453838 T TAC 2 0
chr1 567652 T TG 1 0
chr1 602541 ... (2 Replies)
I have two files (csv and vcf) which look exactly like this
S1.csv
func,gene,start,info
"exonic","AL","2309","het"
"exonic","NEF","6912","hom"S1.vcf
##fileinfo
#CHROM POS ID INFO
chr1 4567 rs323211 1/1:84,104,99
chr4 2309 rs346742 1/1:27,213,90
chr6 5834 ... (5 Replies)
Hello All,
I have a requirement in which i will be given a sql query as input in a file with dynamic number of columns. For example some times i will get 5 columns, some times 8 columns etc up to 20 columns.
So my requirement is to generate a output query which will have 20 columns all the... (7 Replies)
Discussion started by: vikas_trl
7 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)