我正在用下面给出的谷歌折线图制作折线图
google.charts.load('current', {
'packages': ['line']
});
google.charts.setOnLoadCallback(drawLineChart);
function drawLineChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'March');
data.addColumn('number', '2020');
data.addColumn('number', '2021');
var date = new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);
var rows = '';
var rows_arr = [];
$.ajax({
url: "{{route('admin.geteachdaysales')}}",
type: "get",
success: function(res) {
var i;
for (i = 1; i <= lastDay.getDate(); i++) {
if (i == lastDay.getDate()) {
rows += '[' + parseInt(i) + ',' + (res.current_year_data[i]) + ',' + (res.prev_year_data[i]) + ']';
} else {
rows += '[' +
parseInt(i) + ',' + (res.current_year_data[i]) + ',' + (res.prev_year_data[i]) + '],';
}
var row_obj = [i, res.current_year_data[i], res.prev_year_data[i]]
rows_arr.push(row_obj);
}
}
});
data.addRows(rows_arr);
//data.addRows(JSON.parse(rows_arr));
var options = {
chart: {
title: 'Box Office Earnings in First Two Weeks of Opening',
subtitle: 'in millions of dollars (USD)'
},
axes: {
x: {
0: {
side: 'top'
}
}
}
};
var chart = new google.charts.Line(document.getElementById('linechart_material'));
chart.draw(data, google.charts.Line.convertOptions(options));
}
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<div id="linechart_material" style="height: 200px; width: 300px;"></div>
但问题是我安慰rows
它显示的像[1,0,0],[2,0,0],[3,0,0],[4,0,0],[5,0,0],[6,0,0],[7,0,0],[8,0,0],[9,0,0],[10,0,0],[11,0,0],[12,0,0],[13,0,0],[14,0,0],[15,0,0],[16,0,0],[17,0,0],[18,2000,11000],[19,0,0],[20,0,0],[21,0,0],[22,0,0],[23,0,0],[24,0,0],[25,0,0],[26,0,0],[27,0,0],[28,0,0],[29,0,0],[30,0,0],[31,0,0]
和
当我在其中静态添加它时,data.addRows([[1,0,0],[2,0,0],[3,0,0],[4,0,0],[5,0,0],[6,0,0],[7,0,0],[8,0,0],[9,0,0],[10,0,0],[11,0,0],[12,0,0],[13,0,0],[14,0,0],[15,0,0],[16,0,0],[17,0,0],[18,2000,11000],[19,0,0],[20,0,0],[21,0,0],[22,0,0],[23,0,0],[24,0,0],[25,0,0],[26,0,0],[27,0,0],[28,0,0],[29,0,0],[30,0,0],[31,0,0]]);
它会正确显示图表,但是当添加它时,data.addRows([rows]);
它会显示如下错误
未捕获(承诺中)错误:第 0 行不是空值或数组。
有人可以帮我吗?