Question

我使用带有离散值的谷歌图表，并且似乎无法绘制vAxis线（黑色）。

在连续值中显示图形时，但我不希望图表以这种方式间隔开。

这里有两种类型的图表。

google.load("visualization", "1", {packages: ["corechart"]});
google.setOnLoadCallback(drawChart);

function drawChart() {
    var discreteData = new google.visualization.DataTable();
    discreteData.addColumn('string', 'Number');
    discreteData.addColumn('number', 'Value');

    discreteData.addRows([
        ['1.492', 10],
        ['30.701', 17],
        ['127.469', 6],
        ['749.382', 11]
    ]);

    var discreteChart = new google.visualization.ColumnChart(document.getElementById('discrete_chart_div'));
    discreteChart.draw(discreteData, {
        title: 'Discrete Axis Line Chart'
    });

    var continuousData = new google.visualization.DataTable();
    continuousData.addColumn('number', 'Number');
    continuousData.addColumn('number', 'Value');

    continuousData.addRows([
        [1.492, 10],
        [30.701, 17],
        [127.469, 6],
        [749.382, 11]
    ]);

    var continuousChart = new google.visualization.ColumnChart(document.getElementById('continuous_chart_div'));
    continuousChart.draw(continuousData, {
        title: 'Continuous Axis Line Chart'
    });
}

如何绘制vAxis线？

Answer 1

“vAxis线”实际上是hAxis基线，仅适用于连续轴。有点hackery，您可以将数据放在一个连续的轴上，同时保持其独立性。使用DataView将数据转换为“数字”类型（使用值的行索引和字符串值作为格式化值），并从视图中的值/格式化值对构建hAxis.ticks选项：

function drawChart() {
    var discreteData = new google.visualization.DataTable();
    discreteData.addColumn('string', 'Number');
    discreteData.addColumn('number', 'Value');

    discreteData.addRows([
        ['1.492', 10],
        ['30.701', 17],
        ['127.469', 6],
        ['749.382', 11]
    ]);

    var view = new google.visualization.DataView(discreteData);
    view.setColumns([{
        type: 'number',
        label: discreteData.getColumnLabel(0),
        calc: function (dt, row) {
            return {v: row + 1, f: dt.getFormattedValue(row, 0)};
        }
    }, 1]);

    var ticks = [];
    for (var i = 0; i < view.getNumberOfRows(); i++) {
        ticks.push({v: view.getValue(i, 0), f: view.getFormattedValue(i, 0)});
    }

    var range = view.getColumnRange(0);
    var offset = 0.5; // change this to move the left/right margins of the chart

    var discreteChart = new google.visualization.ColumnChart(document.getElementById('discrete_chart_div'));
    discreteChart.draw(view, {
        title: 'Discrete Axis Line Chart',
        hAxis: {
            ticks: ticks,
            viewWindow: {
                min: range.min - offset,
                max: range.max + offset
            },
            // set gridlines.color to "transparent" to hide the vertical gridlines
            /*
            gridlines: {
                color: 'transparent'
            }
            */
        }
    });
}
google.load('visualization', '1', {packages:['corechart'], callback: drawChart});

Ex：http://jsfiddle.net/asgallant/h4Kfd/

谷歌图表离散轴显示线？

1 个答案: