Question

我试图通过google charts显示货币汇率折线图。

基本上我有两种类型的值：

日期（格式iso8601）
费率（十进制数）

当我试图渲染图表时，我得到一个错误：＆＃34;轴＃0的数据列不能是字符串＆＃34;

这是我的代码：

PHP数组制作：

        $xml=simplexml_load_file('https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/ils.xml') or die("Error: Cannot create object");
    $arrayForChart = array();
    $arrayForChart["Date"] = "Rate";
    foreach ($xml->DataSet->Series->Obs as $key => $value) {
        $dateIso8601Format=$value['TIME_PERIOD'];
        $rateForDate=(string)$value['OBS_VALUE'][0];
        $arrayForChart["$dateIso8601Format"] = $rateForDate;
    }
    $arrayForChart = json_encode($arrayForChart);

的Javascript

var arrayForChart;
$.ajax({
    type: "POST",
    url: ajaxUrl,
    //data: {configuration: Config },
    success: function (data) {

        arrayForChart = data;
        arrayForChart = $.map(arrayForChart, function (el) {
            return el;
        });//converting js object to js array

    },
    cache: false
});
google.charts.load("current", {packages: ["corechart", "line"]});
google.charts.setOnLoadCallback(drawLineColors);

function drawLineColors() {

    var data = google.visualization.arrayToDataTable([arrayForChart]);

    var options = {
        hAxis: {
            title: "Rate",
            id: "Rate",
            label: "Rate",
            type: "number"
        },
        vAxis: {
            title: "Date",
            id: "Date",
            label: "Date",
            type: "string"
        },
        colors: ["#a52714", "#097138"]
    };

    var chart = new google.visualization.LineChart(document.getElementById("chart_div"));
    chart.draw(data, options);
}

数据样本：

["Rate","4.7278","4.7301","4.6814"]

任何人都可能知道这是什么问题？

非常感谢！

谷歌图表：＆＃34;轴＃0的数据列不能是字符串＆＃34; eror

0 个答案: