html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var dataSet = anychart.data.set([

        [1, 22, 13],

        [13, 22, 23],

        [17, 22, 33],

        [21, 22, 43]

    ]);

    var mapping = dataSet.mapAs({"value": [2]});

    var getRowsCount = mapping.getRowsCount(); // get rows count

    var chart = anychart.pie();

    chart.data(mapping);

    chart.title("Rows count: " + getRowsCount);

    chart.container("container");

    chart.draw();

});