Not able to pre select

[jcrodriguezam]

I'm not able to preselect an element.
var selected = 3;

$('#day-picker').picker({
data: $scope.portfolios,
lineHeight: 30,
selected:selected,
}, function (s) {
$('.output').html(s);
$('.day-picker').data('value', s);
});
}

always is selected element 0.