Variograms: Data

To access this screen:

Display the Variogram screen.
Load an experimental variogram data file. See Variograms: Data Selection.
Display the Charts tab and select a variogram chart.
Select the Data tab.

View the lag details for the variogram selected in the Charts tab. A variogram must first be selected (highlighted in blue) in the Charts tab before data is listed in the Data tab.

Note: On this screen, each displayed table row corresponds to a record in the loaded experimental variogram file and is represented by a point on the chart in the preview pane. The point is only displayed on the chart if the NO.PAIRS column value is equal to or greater than the Minimum No of Pairs parameter set in the Data Selection tab. All records are listed in this pane irrespective of this.

For each experimental variogram record, the following attributes display:

Attribute	Description
[Key Field]	The Key Field and Key Value combination as selected on the Data Selection tab .
GRADE	The name of the grade or quality field selected in Value Field on the Data Selection tab .
AZI	The azimuth or dip direction, in the local coordinate system, of the varogram; '-' denotes the omnidirectional variogram.
DIP	The dip, in the local coordinate system, of the variogram; ; '-' denotes the omnidirectional variogram.
WAZI	The azimuth of the variogram, in the world coordinate system. This is only included if one or more rotation angle have been defined. If rotation angles are not defined, then WAZI and AZI have the same value.
WDIP	The dip of the variogram, in the world coordinate system. This is only included if one or more rotation angles have been defined. If rotation angles are not defined, then WDIP and DIP would have the same value.
LAG	The lag distance.
AVE.DIST	Average distance between sample pairs for the LAG.
NO.PAIRS	Number of sample pairs for the LAG.
COVAR	Covariance between sample pairs.
VGRAM	Experimental variogram value between sample pairs.
PWRVGRAM	The pairwise relative variogram or relative cross variogram. This is the same as the variogram or cross variogram, except that every term in the calculation is divided by the average value of the two samples contributing to that term.
LOGVGRAM	The log variogram or cross variogram. This is calculated by taking the logs of the grade values before calculating the variogram or cross variogram.

For more information on variogram parameters, see VGRAM Process.