Calculate Local G* Statistics

Choose "Local G*" from the Methods menu. For SpaceStat to calculate the Local G* statistic, it needs to know for which dataset at which time(s), the spatial weights set to use, and how to name the results datasets. The G* requires a spatial weights set that includes ego in the weights set.

Click on the images below for more information.

Input

When the task manager opens for calculating the Local G*, it will start on the "Input" section.  Recall that to calculate G*, you must use a spatial weights set that includes the value at the focal location i, or "ego."  If none of your spatial weight sets meet this criterion, then there will not be any sets in the pulldown menu, but you can use the "Define" button to create a new weight set.

Advanced

The advanced section allows you to change the alpha level and to choose whether to use the Simes correction.

Output

The output section of the task manager for the Local G* asks for a name stem to use for output files.  The default name for analyses on the dataset "RWM" in the geography called "SE and Gulf Coast" is shown below.

Run method

The run method page presents a summary of the previous three pages so that you can review the choices you have selected.  If everything here looks correct, select the "Run" button at the bottom of the page.   The map output from this run is shown in the image on the "Local G* Results" page.