ch" style="width: 600px; height: 200px"></div>
            <div class="controls">
                <button data-index="0">Original</button>
                <button data-index="1">Bigger</button>
            </div>
        </div>
        <script>
        $(function() {
            var sizes = [
                [600, 200],
                [800, 320]
            ];

            var chart = $('#test-4 .epoch').epoch({
                type: 'line',
                data: data().add(function(x) { return Math.sin(x)