IntervalNumericScaleOptions.UnderflowValue Property

Gets or sets the end value for the interval that includes underflow values.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v24.1.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public double? UnderflowValue { get; set; }

VB.NET

Public Property UnderflowValue As Double?

Property Value

Type	Description
Nullable<Double>	A floating-point value that is the underflow interval’s threshold.

Remarks

The underflow interval is the leftmost interval and includes data points whose arguments are less than or equal to UnderflowValue.

Use the IntervalNumericScaleOptions.UnderflowValuePattern property to format the underflow interval text.

Example

This example demonstrates how to create a histogram chart with bins of a given width.

The code below configures a histogram for a chart with a numeric x-axis scale.

XAML

<dxc:ChartControl x:Name="chartControl">
    <dxc:XYDiagram2D>
        <dxc:XYDiagram2D.AxisX>
            <dxc:AxisX2D TickmarksMinorVisible="False" 
                         GridLinesVisible="True">
                <dxc:AxisX2D.NumericScaleOptions>
                    <!-- Configure a histogram with the specified number of bins. -->
                    <dxc:WidthIntervalNumericScaleOptions AggregateFunction="Histogram" 
                                                          Width="10"
                                                          OverflowValue="20"
                                                          UnderflowValue="-30"
                                                          GridLayoutMode="GridAndLabelCentered"
                                                          Pattern="{}{OB}{A1:F0}; {A2:F0}{CB}"
                                                          OverflowValuePattern="{}{OS} {A1:F0}"
                                                          UnderflowValuePattern="{}{US} {A2:F0}"/>
                    <!--...-->                                                                  
                </dxc:AxisX2D.NumericScaleOptions>
                <dxc:AxisX2D.WholeRange>
                    <dxc:Range SideMarginsValue="0.8"/>
                </dxc:AxisX2D.WholeRange>
                <dxc:AxisX2D.Title>
                    <dxc:AxisTitle Content="Temperature (°C)" FontSize="14" Margin="0" Padding="0"/>
                </dxc:AxisX2D.Title>
            </dxc:AxisX2D>
        </dxc:XYDiagram2D.AxisX>
        <dxc:BarSideBySideSeries2D  DisplayName="Temperature" 
                                    DataSource="{Binding}" 
                                    ArgumentDataMember="Temperature" 
                                    BarWidth="1">
        </dxc:BarSideBySideSeries2D>
    </dxc:XYDiagram2D>
</dxc:ChartControl>

The following API members configure the histogram options:

Member	Description
WidthIntervalNumericScaleOptions	The options that provide means to create axis intervals with a specified width.
ManualNumericScaleOptions.AggregateFunction	Gets or sets the function that is used to aggregate numeric axis data when one of the AxisX2D.NumericScaleOptions, AxisX3D.NumericScaleOptions, or CircularAxisX2D.NumericScaleOptions properties is set to ManualNumericScaleOptions.
WidthIntervalNumericScaleOptions.Width	Gets or sets the interval width in x-axis measurement units.
IntervalNumericScaleOptions.OverflowValue	Gets or sets the start value for the interval that includes overflow values.
IntervalNumericScaleOptions.UnderflowValue	Gets or sets the end value for the interval that includes underflow values.
IntervalNumericScaleOptions.GridLayoutMode	Gets or sets the value that specifies the alignment of grid lines, major tickmarks and axis labels.
IntervalNumericScaleOptions.Pattern	Gets or sets a format string that configures text for the interval axis labels and crosshair labels.
IntervalNumericScaleOptions.OverflowValuePattern	Gets or sets a format string that configures text for the overflow interval axis labels and crosshair labels.
IntervalNumericScaleOptions.UnderflowValuePattern	Gets or sets a format string that configures text for the underflow interval axis labels and crosshair labels.