Madograms

Madograms are similar to traditional variograms (see Semivariance Analysis), except that the absolute difference between zi and zi+h is used rather than the square of the difference as for traditional semivariance. The formula thus becomes

$images\formula_madogram_wmf.gif$

Madograms (both isotropic and anisotropic) appear in the Autocorrelation Window, on the Madogram tab. Pressing the Expand button on this tab brings up the Madograms window:

$images\autocorrelation_analysis_window_madogram_tab.gif$

The Cloud/Scatter, right-click menu, and other commands work here as they do for the Variograms Window.