#!/usr/bin/env perl

use strict;
use warnings;

use PDL;
use PDL::NiceSlice;

my $x = pdl(0,4,0,-3);

print "Before: $x\n";

$x(which($x > 0)) .= 1;
$x(which($x < 0)) .= 0;
$x(which($x == 0)) .= int(rand(9)) > 5 ? 1: 0;

print "After: $x\n";

exit;


##</code><code>##

#!/usr/bin/env perl

use strict;
use warnings;

use PDL;

my $x = pdl(0,4,0,-3);

print "Before: $x\n";

my $n = nelem($x);

    for ( my $i = 0; $i < $n; ++$i ) {
        my $val = $x->index($i);
        $val = $val > 0 ? 1 :
               $val < 0 ? 0 :
               $val == 0 ? (int(rand(9)) > 5 ? 1 : 0) : undef;
        $x->index($i) .= $val;
    }

print "After: $x\n";

exit;