Varograms - Format

To access this dialog:

In the Variogram dialog, select the Format tab.

The Format tab is used to configure the variogram chart's Annotation, Axes, Grid, Comments, Color, Legend and Options settings.

These chart settings are used in both the chart in the Plots window and in any instance where it is used as a plot item.

Field Details:

Annotation:

Title: accept the default or type in a custom description; select a font size from the drop-down.

X Axis: accept the default or type in a custom description; select a font size from the drop-down.

Y Axis: accept the default or type in a custom description; select a font size from the drop-down.

Custom Axes:

X Axis: tick the box to allow the definition of custom Minimum, Maximum and Interval settings.

Y Axis: tick the box to allow the definition of custom Minimum, Maximum and Interval settings.

The default Maximum Y value is calculated automatically so that all variogram points are displayed on the chart. When a variogram is added or removed the Maximum Y value may change accordingly. Defined custom axes vales will not change when variograms are added or removed.

Grid:

X Axis: select a linestyle and color from the drop-downs.

Y Axis: select a linestyle and color from the drop-downs.

Hide the grid lines by setting the grid line color the same as the chart background color.

Add Comments: tick the Add Comments check box and add comments in the text box. Click Apply to display the comments on the chart. The comments can be dragged to the required location on the chart using the mouse.

Color: You can select the background color for the chart.

Chart Background: select a chart background color from the drop-down.

Fixed Variogram Color: select this option to display all variograms with the same fixed color; select a color from the drop-down.

Variogram Color Cycle: select this option to display the variograms with a color cycle; define a cycle number.

By default, the Variogram Color Cycle option will be selected and colors will be assigned to the experimental variograms using a cycle of length 8. This means that the 1st and 9th variograms will be the same color, the 2nd and 10th will be the same color, and so on. The length of the cycle can be varied between 8 and 64 based on the standard color sequence.

Another method of assigning a color and symbol to a variogram is to right click the variogram from the list on the Data Selection tab and select Edit Properties.

Legend Options: these options control the information displayed alongside each legend:

Display Grade in Legend: check/clear this box to show/hide the value field name(s).
Display Key/Value in Legend: check/clear this box to show/hide the key value (if a key field has been specified in the experimental variogram file).
Display AZI and DIP in legend: check/clear this box to show/hide both azimuth and dip values for the current variogram.
Display File Name in Legend: check/clear this box to show/hide the name of the imported experimental variogram file.

Options: the following general chart options are available:

Display Normalized Variograms: if selected then all variogram values will be divided by the statistical variance of the original data. This means that the theoretical sill of each variogram is 1. This is useful if you want to display variograms for different grades on the same chart as it will mean that the variograms are approximately the same scale in the Y direction. If you have previously selected Custom Axis you may need to update the maximum Y value.
Symbol at Each Point: include/exclude the symbol that is displayed at each variogram point on the chart.
Display Sample Pairs: show/hide the annotation for the number of pairs of samples used to calculate each variogram point.
Display Variance of Samples: show/hide the horizontal line on the chart representing the sample variance statistic. This is often used as a starting point for defining the variogram model sill.
Display Angle in World Coordinate System: toggle between displaying the Local and World coordinate system AZI and DIP values.

This applies to the legends on the charts, the descriptions on the Charts tab and the headings for the variogram ranges on the Model Fitting tab.

The local coordinate system (the default) is measured relative to the reference plane that was defined in VGRAM when calculating the variograms. The world coordinate system is the system used for the X, Y and Z coordinates of the samples from which the variograms were calculated. If the horizontal plane (the default) was defined in VGRAM then the two systems will be the same.

	Related Topics
	VARMOD - Introduction VARMOD - Data Selection VARMOD - Charts VARMOD - Data VARMOD - Model Fitting