IVZDataScale.ConstructScaleElements

Syntax

ConstructScaleElements(Values: IVZDataArray);

Parameters

Values. Array of data displayed by visualizer. The scale is calculated by this data.

Description

The ConstructScaleElements method recalculates visualizer scale by means of the data array and specified calculation mode.

Comment

The method is relevant to use if automatic scale step calculation (AutoCalculable=True) is enabled.

Before calculating the scale the number of intervals can be determined.

Example

Executing the example requires that the repository contains an express report with the EXPRESS identifier. The Color metric should be selected in the bubble tree report. The unit containing the example should have links to the Express, Metabase and Visualizators system assemblies.

Sub UserProc;
Var
    Metabase: IMetabase;
    EaxAnalyzer: IEaxAnalyzer;
    BubbleTree: IVZBubbleTree;
    Scale: IVZDataScale;
    DataSource: IVZMultiplyDataSource;
    Values: IVZDataArray;
Begin
    // Get the current repository
    Metabase := MetabaseClass.Active;
    // Get express report
    EaxAnalyzer := Metabase.ItemById("EXPRESS").Edit As IEaxAnalyzer;
    BubbleTree := EaxAnalyzer.BubbleTree.BubbleTree;
    // Get bubble tree color scale
    Scale := BubbleTree.ColorVisual.ColorMapping.Scale;
    // Enable automatic scale calculation
    Scale.AutoCalculable := True;      
    // Enable use of "equal" elements in scale
    Scale.EnableEquality := True;  
    // Determine visualizer scale calculation mode
    Scale.Mode := VisualizatorScaleMode.ScaleLogarithmic;
    // Determine logarithmic scale base
    Scale.LogarithmBase := 4;
    // Get data source
    DataSource := BubbleTree.ColorVisual.ColorMapping.DataSource;
    // Get array of data, based on which scale is calculated
    Values := New VZDataArray.Create;
    Values := DataSource.GetAllLevelDataEx("color",-1);
    // Recalculate scale if data was obtained 
    If Values <> Null Then
        Scale.ConstructScaleElements(Values);
    Else 
        Debug.WriteLine("No data, scale is not calculated");
    End If;
    // Save changes made in express report 
    (EaxAnalyzer As IMetabaseObject).Save;
End Sub UserProc;

After executing the example the visualizer scale is recalculated with specified parameters and data.

See also:

IVZDataScale