MODELBUILDING subcommand (SPATIAL TEMPORAL PREDICTION command)

The MODELBUILDING subcommand specifies parameters for building the model.

SIGNIFICANCE=value

The significance level for determining if a parametric variogram-based model is appropriate. The value must be greater than 0 and less than 1. The default value is 0.05. If the significance level is higher than the specified value, an empirical model is used, regardless of the setting on the COVARIANCE keyword. The results of one of the tests used to make this determination are displayed in the test of spatial covariance table (MODELTABLES subcommand, COVARIANCE keyword).

INTERCEPT=NO | YES

Include the intercept in the model. The default setting value is NO.

COVARIANCE=VARIOGRAM (value) | EMPIRICAL

The covariance method for the model. The default method is VARIOGRAM. The keyword VARIOGRAM is followed by a value enclosed in parentheses. The value must be between 1 and 2.

AUTOREGRESSIONLAG=value

The maximum autoregression lag. The value must be an integer between 1 and 5. The default value is 1. The number of time intervals in the data must be at least double the autoregression lag value.

MISSINGRECORDS=value

Maximum allowed proportion of records (cases) with missing values. If a record has a missing value for the target field or a predictor field, it is not included in the analysis. If the total number of records with missing target or predictor values exceeds the specified proportion, the procedure does not run. The value must be greater than 0 and less than 1. The default value is 0.05.

UNCERTAINTY=value

The uncertainty factor is a proportion value that represents the growth in uncertainty when forecasting into the future. The upper and lower limits of forecast uncertainty increase by the specified proportion for each step into the future. The value must be greater than 0 and less than 1. The default value is 0.05.