Variogram cloud properties
As with other data views in SpaceStat, you can change the properties
of a variogram cloud by accessing the
variogram cloud properties dialog box (select "Graph" and then
"Properties" from within the variogram cloud window). Note
that at the bottom of the dialog box, there is an "Apply" button
that allows you to view potential changes to your variogram cloud output
without closing the properties window.
Title and point symbols
At the top of this dialog box, you can change the title on the variogram cloud window, and can change the symbols and size of all points in the cloud (if you want to see your data as points but they are appearing as pixels, you need to unselect the "2D histogram" option). In the far right box on this line, you can also change the size that points appear once you have selected them.
Plot labels
Just below the options for how symbols are points are shown, you can change the text and font of the variogram cloud's plot labels.
Horizontal and vertical bounds
SpaceStat uses the distance and squared difference values calculated from your dataset (from all times) to set the default bounds for the data displayed in the figure. Specifically, the variogram cloud includes squared difference values computed for distances up to half the diagonal length of the rectangle that bounds the sampled locations. If you want to change the horizontal or vertical bounds shown in the plot, check the "Fixed bounds" box, and then enter your preferred Min and Max values. The bottom of this section of the dialog box also allows you to change the number of labelled tick marks shown in the variogram cloud plot.
Anisotropic cloud options
This variogram properties dialog also gives you another chance to create an anisotropic variogram cloud by entering in constraints on what pairs of points will be shown. See variogram cloud calculation for information on how variogram clouds can be used for examining anisotropy, and next see the guidance on entering values for anisotropic variograms if you are interested in comparing directional variogram clouds. In the line for entering the angle (first of the three boxes), "CCW" stands for counter-clockwise. The options below would produce a variogram focused on points for which location values vary primarily in the east-west direction.
Connecting point pairs, and histogram appearance
Just below the box for entering parameters for creating anisotropic variogram clouds, there is a checkbox on the left side for "connect point pairs in linked maps." This option allows you to select a point or points from the variogram cloud and see the pair(s) of locations that these points represent. This is a way of visualizing outliers in your data, and is described in "identifying outliers with a variogram cloud." At the very bottom of the dialog box, there is another opportunity (like the one always present in the plot window) to toggle between a point and 2D-histogram version of the variogram cloud, and another opportunity to change the number of divisions in the histogram.