ComponentOne FlexChart for WPF
FlexChart / Working with FlexChart / FlexChart Elements / FlexChart Series / Error Bar
In This Topic
    Error Bar
    In This Topic

    Error Bar series allows you to indicate variability of data or uncertainty in values. It enables you to display standard deviations and a range of error in variable data using error bars. Generally, results of scientific studies or experimental sciences use error bars in charts to depict variations in data from original values.

    FlexChart lets you use Error Bar series in different chart types including Area, Column, Line, LineSymbols, Scatter, Spline, SplineArea, and SplineSymbols.

    Error Bar series in FlexChart offers several features, as follows:

    The following image displays Plus and Minus error amounts in the mean MCA (Middle Cerebral Artery) velocity data for different seizure types observed in children. 

    The following code uses mean percentage values of MCA velocity during different kinds of seizures in children. The codes shows how to implement ErrorBar series in FlexChart.

    Class DataCreator
        Public Shared Function CreateData() As List(Of DataItem)
            Dim data = New List(Of DataItem)()
            data.Add(New DataItem("Generalize", 15))
            data.Add(New DataItem("Unilateral Clonic", 22))
            data.Add(New DataItem("Subclinical", 20))
            data.Add(New DataItem("Tonic", 11))
            Return data
        End Function
    End Class
    Public Class DataItem
        Public Sub New(seizuretype__1 As String, meanmca__2 As Integer)
            SeizureType = seizuretype__1
            MeanMCA = meanmca__2
        End Sub
    
        Public Property SeizureType() As String
            Get
                Return m_SeizureType
            End Get
            Set
                m_SeizureType = Value
            End Set
        End Property
        Private m_SeizureType As String
        Public Property MeanMCA() As Integer
            Get
                Return m_MeanMCA
            End Get
            Set
                m_MeanMCA = Value
            End Set
        End Property
        Private m_MeanMCA As Integer
    End Class
    
    class DataCreator
    {
        public static List<DataItem> CreateData()
        {
            var data = new List<DataItem>();
            data.Add(new DataItem("Generalize", 15));
            data.Add(new DataItem("Unilateral Clonic", 22));
            data.Add(new DataItem("Subclinical", 20));
            data.Add(new DataItem("Tonic", 11));
            return data;
        }
    }
    public class DataItem
    {
        public DataItem(string seizuretype, int meanmca)
        {
            SeizureType = seizuretype;
            MeanMCA = meanmca;
        }
    
        public string SeizureType { get; set; }
        public int MeanMCA { get; set; }
    }
    
    Partial Public Class MainWindow
        Inherits Window
        Private _data As List(Of DataItem)
        Public Sub New()
            InitializeComponent()
    
            ' clear data series collection
            flexChart.Series.Clear()
    
            ' create ErrorBar series
            Dim errorBar As New C1.WPF.Chart.ErrorBar()
    
            ' add the series to the data series collection
            flexChart.Series.Add(errorBar)
    
            ' bind X-axis and Y-axis
            flexChart.BindingX = "SeizureType"
            errorBar.Binding = "MeanMCA"
    
            ' specify error amount of the series
            errorBar.ErrorAmount = C1.Chart.ErrorAmount.Percentage
    
            ' specify the direction of the error
            errorBar.Direction = C1.Chart.ErrorBarDirection.Both
    
            ' specify the error value of the series
            errorBar.ErrorValue = 0.3
    
            ' style the ErrorBar series
            errorBar.EndStyle = C1.Chart.ErrorBarEndStyle.Cap
        End Sub
        Public ReadOnly Property Data() As List(Of DataItem)
            Get
                If _data Is Nothing Then
                    _data = DataCreator.CreateData()
                End If
    
                Return _data
            End Get
        End Property
    End Class
    
    public partial class MainWindow : Window
    {
        private List<DataItem> _data;
        public MainWindow()
        {
            InitializeComponent();
    
            // clear data series collection
            flexChart.Series.Clear();
    
            // create ErrorBar series
            C1.WPF.Chart.ErrorBar errorBar = new C1.WPF.Chart.ErrorBar();
    
            // add the series to the data series collection
            flexChart.Series.Add(errorBar);
    
            // bind X-axis and Y-axis
            flexChart.BindingX = "SeizureType";
            errorBar.Binding = "MeanMCA";
    
            // specify error amount of the series
            errorBar.ErrorAmount = C1.Chart.ErrorAmount.Percentage;
    
            // specify the direction of the error
            errorBar.Direction = C1.Chart.ErrorBarDirection.Both;
    
            // specify the error value of the series
            errorBar.ErrorValue = .3;
    
            // style the ErrorBar series
            errorBar.EndStyle = C1.Chart.ErrorBarEndStyle.Cap;
    
        }
        public List<DataItem> Data
        {
            get
            {
                if (_data == null)
                {
                    _data = DataCreator.CreateData();
                }
    
                return _data;
            }
        }
    }