円グラフ

Pie charts, the most common tools used for data visualization, are circular graphs that display the proportionate contribution of each category which is represented by a pie or a slice. The magnitude of the dependent variable is proportional to the angle of the slice. These charts can be used for plotting just one series with non-zero and positive values.

piechart

Create a Pie Chart

Pie chart is represented by the FlexPie class in FlexChart. To create a Pie chart through code, follow these steps:

In XAML, initialize the FlexPie control and configure the X and Y axes by setting the BindingName and Binding properties, respectively. Then set up the data source through the ItemsSource property., as showcased in the following code:

XAML	コードのコピー
<c1:FlexPie x:Name="chart" ItemsSource="{Binding Data}" Binding="Q1" BindingName="Country" Margin="10"> </c1:FlexPie>

Switch to C# and use the following code to create the data source for the chart.

C#	コードのコピー
public class DataItem { public string Country { get; set; } public double Q1 { get; set; } public double Q2 { get; set; } public double Q3 { get; set; } public double Q4 { get; set; } } List<DataItem> data = CreateData(); public List<DataItem> Data => data; public static List<DataItem> CreateData() { var countries = new string[] { "米国", "中国", "英国", "日本" }; var count = countries.Length; var result = new List<DataItem>(); var rnd = new Random(); for (var i = 0; i < count; i++) result.Add(new DataItem() { Country = countries[i], Q1 = rnd.Next(20), Q2 = rnd.Next(20), Q3 = rnd.Next(20), Q4 = rnd.Next(20) }); return result; }

コードのコピー

public class DataItem
{
    public string Country { get; set; }
    public double Q1 { get; set; }
    public double Q2 { get; set; }
    public double Q3 { get; set; }
    public double Q4 { get; set; }
}

List<DataItem> data = CreateData();

public List<DataItem> Data => data;

public static List<DataItem> CreateData()
{
    var countries = new string[] { "米国", "中国", "英国", "日本" };
    var count = countries.Length;
    var result = new List<DataItem>();
    var rnd = new Random();
    for (var i = 0; i < count; i++)
        result.Add(new DataItem()
        {
            Country = countries[i],
            Q1 = rnd.Next(20),
            Q2 = rnd.Next(20),
            Q3 = rnd.Next(20),
            Q4 = rnd.Next(20)
        });
    return result;
}