Using Scalar::Util::Numeric

#!/usr/bin/env perl
use strict;
use warnings;
use Scalar::Util::Numeric qw(isfloat);
use Data::Dumper;

my @data;
push @data, grep { isfloat($_) } split /\s+/ while <DATA>;

print Dumper @data;


__DATA__
360.000 -0.000100033 -1.76122e-05 -9.89111e-05 -1.9003e-05
640.000 -4.54467e-05 9.13758e-05 -4.50576e-05 9.04804e-05
123 V.1234
[download]

dubs@server:~$ perl t1.pl
$VAR1 = '360.000';
$VAR2 = '-0.000100033';
$VAR3 = '-1.76122e-05';
$VAR4 = '-9.89111e-05';
$VAR5 = '-1.9003e-05';
$VAR6 = '640.000';
$VAR7 = '-4.54467e-05';
$VAR8 = '9.13758e-05';
$VAR9 = '-4.50576e-05';
$VAR10 = '9.04804e-05';
[download]