The Covariate Search Shotgun (shotgun covariate search) run mode option is only available for Population models. Covariates and covariate effects must be specified. This run mode performs a shotgun search to evaluate all the possible scenarios and selects the best one out of 2^(number of effects). Each effect added has the effect of doubling the number of scenarios. It creates a list of evaluated scenarios.
Covariate Search Shotgun searches only generate the Overall worksheet as an output worksheet. To generate the full results, change the Run Mode to Scenarios and re-execute. Since the best scenario (based on the criterion -2LL, AIC, or BIC) is selected automatically after the covariate search, it will be used during the Scenarios run. The selected scenario is also used for any subsequent Simple runs.
With Covariate search shotgun selected from the Run Mode pulldown, select the OPTIONS tab.
Refer to the Simple run mode “Estimation” and “Advanced Options” sections for descriptions of most items available on the Covariate Search Shotgun OPTIONS tab.
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