VASTATUS procedure

Displays the contents of a model-definition structure defined for a REML analysis (R.W. Payne).

No Options

Parameters

Description

REML model-definition structures are designed to simplify the assessment of alternative models for a REML analysis. They can be defined by the VFMODEL and VFSTRUCTURE procedures, and used as input to procedures like VARANDOM to run the various analyses and select the one with the most effective random model. This process is used, for example, within the VABLOCKDESIGN and VAROWCOLUMNDESIGN procedures to analyse data from block and row-and-column designs.

These model-selection procedures allow you to save the model-definition structure that defined the best REML analysis. You can then use this as the setting of the MODELSTRUCTURE parameter of VASTATUS to see the details of the definition.

Options: None

Parameters: MODELSTRUCTURE

See Also

Procedures: VFMODEL, VFSTRUCTURE, VABLOCKDESIGN, VAROWCOLUMNDESIGN, VARANDOM.

Commands for: REML analysis of linear mixed models.

Example

CAPTION 'VA2BLUPS example',\
        'Slate Hall Farm data (Guide to REML in Genstat, Section 1.8).';\
        STYLE=meta,plain
SPLOAD  '%data%/Slatehall.gsh'
VAROWCOLUMNDESIGN [PRINT=best,description,deviance,aic,sic,dfrandom;\
                  PTRY=*; FIXED=variety; REPLICATES=replicates;\
                  ROWS=fieldrow; COLUMNS=fieldcolumn;\
                  TRYSPATIAL=always; TRYTRENDS=yes;\
                  RSTRATEGY=fastoptimal]\
                  Y=yield; BESTMODEL=bestrcmodel; SAVE=savebest
VASTATUS          bestrcmodel