09-22-2008
Substring HELP!
Hi,
I am trying to do something which I thought was very simple but still being a beginner, has proved not to be.
Input:
val1 val2 val3 val4 val5 val6
.
.
.
etc
Desired Output:
Every row in which value of val6 is a number starting with 0.0 or contains a capital E. The input is in .tab format
Sample:
INPUT:
val1 val2 val3 val4 val5 0.123
val1 val2 val3 val4 val5 0.01456
val1 val2 val3 val4 val5 0.000123
val1 val2 val3 val4 val5 0.0123
val1 val2 val3 val4 val5 3.2E-52
val1 val2 val3 val4 val5 0.153
val1 val2 val3 val4 val5 1
OUTPUT:
val1 val2 val3 val4 val5 0.01456
val1 val2 val3 val4 val5 0.000123
val1 val2 val3 val4 val5 0.0123
val1 val2 val3 val4 val5 3.2E-52
I have tried various scripts, all gave me errrors or didn't stop running.
I've tried
#!/bin/bash
for f in input.tab
do
awk ' c==substr($6, 1, 3)
if c==0.0 || E
print c'
done
I know this doesn't work, and I really need help. That would be very appreciated. Thanks!!
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LEARN ABOUT DEBIAN
tk::optionmenu
Optionmenu(3pm) User Contributed Perl Documentation Optionmenu(3pm)
NAME
Tk::Optionmenu - Let the user select one of some predefined options values
SYNOPSIS
use Tk::Optionmenu;
$opt = $w->Optionmenu(
-options => REFERENCE_to_OPTIONLIST,
-command => CALLBACK,
-variable => SCALAR_REF,
);
$opt->addOptions( OPTIONLIST );
# OPTION LIST is
# a) $val1, $val2, $val3,...
# b) [ $lab1=>$val1], [$lab2=>val2], ... ]
# c) combination of a) and b), e.g.,
# val1, [$lab2=>val2], val3, val4, [...], ...
DESCRIPTION
The Optionmenu widget allows the user chose between a given set of options.
If the user should be able to change the available option have a look at Tk::BrowseEntry.
OPTIONS
-options
(Re)sets the list of options presented.
-command
Defines the callback that is invokes when a new option is selected.
-variable
Reference to a scalar that contains the current value of the selected option.
-textvariable
Reference to a scalar that contains the text label of the current value of the selected option.
METHODS
addOptions
Adds OPTION_LIST to the already available options.
EXAMPLE
use Tk;
my $mw = MainWindow->new();
my ($var, $tvar);
my $opt = $mw->Optionmenu(
-options => [[jan=>1], [feb=>2], [mar=>3], [apr=>4]],
-command => sub { print "got: ", shift, "
" },
-variable => $var,
-textvariable => $tvar
)->pack;
$opt->addOptions([may=>5],[jun=>6],[jul=>7],[aug=>8]);
my $f = $mw->Frame(-relief=>'groove', -borderwidth => 2)->pack;
$f->Label(-textvariable=>$tvar)->pack(-side => 'left');
$f->Label(-text => " -> ")->pack(-side => 'left');
$f->Label(-textvariable=>$var)->pack(-side => 'left');
$mw->Button(-text=>'Exit', -command=>sub{$mw->destroy})->pack;
MainLoop;
SEE ALSO
Tk::Menubutton, Tk::BrowseEntry
perl v5.14.2 2010-05-29 Optionmenu(3pm)