Use this to specify initial values for model parameters when fitting models to variograms. The parameters listed will depend on the form of the variogram (isotropic or anisotropic) and the selected model. If any of the fields are left blank then the initial values will be determined automatically.
Isotropic model
For the spherical, pentaspherical, exponential, Gaussian, stable, circular, cubic, besselk1, cardinal sine and bounded linear models:
Range | Specifies an initial value for the distance or range parameter. |
For the double-spherical:
Range 1 | Specifies an initial value for the first distance or range parameter. |
Range 2 | Specifies an initial value for the second distance or range parameter. |
Geometrical anisotropic model
For the spherical, pentaspherical, exponential, Gaussian, stable, circular and cubic models:
Phi | Specifies an initial value for the angle in radians of the direction of maximum variation. |
Maximum range | Specifies an initial value for the maximum distance or range parameter. |
Minimum range | Specifies an initial value for the minimum distance or range parameter. |
For the power model:
Phi | Specifies an initial value for the angle in radians of the direction of maximum variation. |
Maximum gradient | Specifies an initial value for the maximum gradient. |
Minimum gradient | Specifies an initial value for the minimum gradient. |
Action Icons
![]() |
Clear | Clear all fields and list boxes. |
![]() |
Help | Open the Help topic for this dialog. |
See also
- Model Variogram menu for modelling variograms.