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雷达图(也称为蜘蛛图)是二维图表,可用于表示以图形格式在行和列中绘制的多元数据。
SpreadJS支持表单中的雷达图,以便允许用户执行动态数据比较并进行全面的信息分析。 此外,通过对两个或多个数据系列的合计值进行深入评估,雷达图使可视化和操纵信息变得更加轻松快捷。
雷达图通常用于比较一系列特征范围内的两个或多个实体。 在雷达图中,三个或更多定量变量表示在轴上,每个类别都有从中心点放射的自己的值轴。 使用直线来连接系列值,并且轴的相对位置或角度通常是不可预测的。
Spread JS支持三种类型的雷达图-1)基本雷达图2)雷达填充图和3)带有标记的雷达图。
在下面显示的示例中,借助不同类型的雷达图的帮助下绘制在六个不同的科目(数学,英语,历史,生物学,地理和动物学)考试成绩分析,并给出了以下数据:
此示例代码显示了如何在表单中创建基本雷达图,填充雷达图和带标记的雷达图以分析两个学生的分数。
// 初始化 Spread
var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 3 });
// 获取表单
var activeSheet = spread.getSheet(0);
// 添加数据
var dataArray =
[
['', 'Lisa', 'Tim'],
['Mathematics', 87, 64],
['English', 79, 59],
['History ', 58, 75],
['Biology', 64, 96],
['Geography', 49, 85],
['Zoology', 64, 83]
];
activeSheet.setArray(1, 1, dataArray);
activeSheet.setColumnWidth(0, 20);
for (var i = 1; i < 4; i++) {
activeSheet.setColumnWidth(i, 100);
}
activeSheet.options.gridline.showHorizontalGridline = false;
activeSheet.options.gridline.showVerticalGridline = false;
activeSheet.getRange(1, 1, 7, 3)
.hAlign(GC.Spread.Sheets.HorizontalAlign.center)
.setBorder(new GC.Spread.Sheets.LineBorder('black', GC.Spread.Sheets.LineStyle.thin),
{ all: true });
activeSheet.getRange(1, 2, 1, 3).font('bold normal 10pt Arial');
activeSheet.getRange(2, 1, 6, 1).font('bold normal 10pt Arial');
// 添加雷达图
// 1 - 雷达图
// 2 - 雷达填充图
// 3 - 带标记的雷达图
var chart = activeSheet.charts.add('RadarChart', GC.Spread.Sheets.Charts.ChartType.radar, 250, 0, 500, 410, '$B$2:$D$7');
var legend = chart.legend();
legend.visible = true;
legend.position = GC.Spread.Sheets.Charts.LegendPosition.bottom;
chart.legend(legend);
var chartArea = chart.chartArea();
chartArea.fontSize = 14;
chart.chartArea(chartArea);
var dataLabels = chart.dataLabels();
dataLabels.showValue = true;
dataLabels.showSeriesName = false;
dataLabels.showCategoryName = false;
dataLabels.position = GC.Spread.Sheets.Charts.DataLabelPosition.above;
chart.dataLabels(dataLabels);
var title = chart.title();
title.text = 'Test Score Analysis';
title.fontSize = 22;
title.color = "#b20000";
title.fontFamily = 'Cambria';
chart.title(title);
var axes = chart.axes();
axes.primaryCategory.style.color = '#000000';
axes.primaryValue.majorGridLine.color = '#ccc';
chart.axes(axes);
var series = chart.series();
var lisaSeries = series.get(0);
lisaSeries.border.color = 'skyblue';
lisaSeries.backColor = 'skyblue';
lisaSeries.backColorTransparency = '0.5';
series.set(0, lisaSeries);
var timSeries = series.get(1);
timSeries.border.color = 'orange';
timSeries.backColor = 'orange';
timSeries.backColorTransparency = '0.5';
series.set(1, timSeries);