AxisLabelScientificNotation Class

Converts axis label numbers to scientific notation.

Namespace: DevExpress.XamarinForms.Charts

Assembly: DevExpress.XamarinForms.Charts.dll

NuGet Package: DevExpress.XamarinForms.Charts

Declaration

public class AxisLabelScientificNotation :
    AxisLabelNotationBase

Remarks

If axis labels display very large or very small numbers that take up a large amount of space, you can use scientific or engineering notation to display these numbers.

In scientific notation, a number is displayed as m×10ⁿ, where the coefficient m is any real number, and the exponent n is an integer. The following scientific notations are supported:

• Normalized - the exponent n is selected so that the coefficient m is at least 1 but less than 10.
• E - ×10 is replaced with E.
• Logarithmic - bases other than 10 can be used (for example, m×2ⁿ).

Normalized and E Notations

1. Assign an AxisLabelScientificNotation object to the LabelValueNotation property of a numeric axis object.
2. Set the AxisLabel.TextFormat property to “#E+0”.
3. Set the AxisLabelScientificNotation.ScientificNotation property to the Normalized (default) or E value.
   

This example shows how to convert numbers that Y-axis labels display to normalized notation.

Xaml

<dxc:ChartView>
    <dxc:ChartView.Series>
        <!-- Series data. -->
    </dxc:ChartView.Series>

    <dxc:ChartView.AxisY>
        <dxc:NumericAxisY>
            <dxc:NumericAxisY.LabelValueNotation>
                <dxc:AxisLabelScientificNotation/>
            </dxc:NumericAxisY.LabelValueNotation>
            <dxc:NumericAxisY.Label>
                <dxc:AxisLabel TextFormat="#E+0"/>
            </dxc:NumericAxisY.Label>
            <!-- Other settings of the Y-axis. -->
        </dxc:NumericAxisY>
    </dxc:ChartView.AxisY>

    <dxc:ChartView.AxisX>
        <!-- The X-axis settings. -->
    </dxc:ChartView.AxisX>
</dxc:ChartView>

Logarithmic Notation

1. Assign an AxisLabelScientificNotation object to the LabelValueNotation property of a numeric axis object.
2. Set the AxisLabelScientificNotation.ScientificNotation property to Logarithmic.

This example shows how to apply logarithmic notation to labels of an X-axis that uses the logarithmic scale to display numeric values. This notation uses powers of a base that the AxisLogarithmicOptions.Base property defines (10, in this example).

Xaml

<dxc:ChartView >
    <dxc:ChartView.Series>
        <!-- Series data. -->
    </dxc:ChartView.Series>

    <dxc:ChartView.AxisX>
        <dxc:NumericAxisX>
            <dxc:NumericAxisX.LogarithmicOptions>
                <dxc:AxisLogarithmicOptions Enabled="True" Base="10"/>
            </dxc:NumericAxisX.LogarithmicOptions>
            <dxc:NumericAxisX.LabelValueNotation>
                <dxc:AxisLabelScientificNotation ScientificNotation="Logarithmic"/>
            </dxc:NumericAxisX.LabelValueNotation>
            <dxc:NumericAxisX.Label>
                <dxc:AxisLabel TextFormat="# Hz"/>
            </dxc:NumericAxisX.Label>
            <!-- Other settings of the X-axis. -->
        </dxc:NumericAxisX>
    </dxc:ChartView.AxisX>

    <dxc:ChartView.AxisY>
        <dxc:NumericAxisY>
            <dxc:NumericAxisY.LogarithmicOptions>
                <dxc:AxisLogarithmicOptions Enabled="True" Base="10"/>
            </dxc:NumericAxisY.LogarithmicOptions>
            <dxc:NumericAxisY.Range>
                <dxc:NumericRange SideMargin="0" Min="0.01" Max="100"/>
            </dxc:NumericAxisY.Range>
            <!-- Other settings of the Y-axis -->
        </dxc:NumericAxisY>
    </dxc:ChartView.AxisY>
</dxc:ChartView>

Implements

INotifyPropertyChanged

Inheritance

Object

ChartElement

AxisLabelNotationBase

AxisLabelScientificNotation