To redraw only when the window resize is completed and avoid multiple triggers, I think is better create an event:

//create trigger to resizeEnd event     

$(window).resize(function() {

    if(this.resizeTO) clearTimeout(this.resizeTO);

    this.resizeTO = setTimeout(function() {

        $(this).trigger('resizeEnd');

    }, 500);

});



//redraw graph when window resize is completed  

$(window).on('resizeEnd', function() {

    drawChart(data);

});