Variogram Object

The Variogram object represents an instance of a variogram plot. Variograms are created by the Shapes.AddVariogram method.

Derived from: Shape object (All methods and properties of Shape apply to this object.)

The following table provides the properties of Variogram object:

Property	Description
Axes	Returns the axes collection. It is a read-only property.
EstimatorType	Returns/sets the variogram estimation method.
ExperimentalLine	Returns the experimental line properties. It is a read-only property.
LagDirection	Returns/sets the lag direction angle (in degrees).
LagTolerance	Returns/sets the lag direction tolerance (in degrees).
LagWidth	Returns/sets the lag width (in XY data units).
MaxLagDistance	Returns/sets the maximum lag distance (in XY data units).
Model	Returns/sets the array of variogram component objects.
ModelLine	Returns the model line properties. It is a read-only property.
NumLags	Returns/sets the number of lags.
PairsFont	Returns the pair annotation properties. It is a read-only property.
ShowExperimental	Returns/sets the show experimental line state.
ShowModel	Returns/sets the show model line state.
ShowPairs	Returns/sets the show pairs state.
ShowSubTitle	Returns/sets the show subtitle state.
ShowSymbols	Returns/sets the show plot symbols state.
ShowVariance	Returns/sets the show variance line state.
SubTitleFont	Returns the plot subtitle font properties. It is a read-only property.
Symbol	Returns the symbol properties. It is a read-only property.
Title	Returns/sets the plot title.
TitleFont	Returns the plot title font properties. It is a read-only property.
VarianceLine	Returns the variance line properties. It is a read-only property.
VerticalScale	Returns/sets the vertical scale.

The following table provides the methods of the Variogram object:

Method	Description
AutoFit	Automatically fits variogram parameters to the current model.
Export	Exports the experimental variogram to a data file.
Statistics	Returns various data statistics.

Example 1

This script displays all the methods and properties in the Variogram object.

The following script demonstrates how the Variogram object is used in reference to the Shapes collection.

Sub Main

'Declares SurferApp as an object

Dim SurferApp As Object

'Creates an instance of the Surfer Application object and assigns it

'to the variable named "SurferApp"

Set SurferApp = CreateObject("Surfer.Application")

'Makes Surfer visible

SurferApp.Visible = True

'Declares Plot as an object

Dim Plot As Object

'Creates a plot document in Surfer and assigns it to the variable

'named "Plot"

Set Plot = SurferApp.Documents.Add(srfDocPlot)

'Declares Shapes as an object

Dim Shapes As Object

'Assigns the Shapes collection to the variable named "Shapes"

Set Shapes = Plot.Shapes

'Declares Variogram as an object

Dim Variogram As Object

'Creates a variogram and assigns it to the variable named "Variogram"

Set Variogram = Shapes.AddVariogram(SurferApp.Path+"\Samples\demogrid.dat")

End Sub