[jQuery] Can I access/change a variable in a plugin?

[jQuery] Can I access/change a variable in a plugin?


Hi, so, I have a pretty basic plugin, and I'm trying to access a
variable that's set when the plugin is initialized. I'd also like to
change that variable on the fly.
Is it possible?
(function($) {
    $.fn.plugin = function(options){
        // default settings
        var settings = {
            marginLeft : 10,
            identifier : 'om',
            xidentifier : 'omx',
            height : 200,
            width : 200
        }
        //extending options
        options = options || {};
         $.extend(settings, options);
        this.each(function(i){
            // do something
        });
    }
})(jQuery);
$('div').plugin();
$('div).data('marginLeft'); ????
Thanks for any help!