$THETAP, $THETAPV

Gives prior information for thetas.

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 $THETAP  value1  [value2]  [value3] ...
 $THETAPV  value1  [value2]  [value3] ...

;# EXAMPLE
 ;# Prior information of THETAS (NTHP=4 of them)
 $THETAP (2.0 FIX) (2.0 FIX) (2.0 FIX) (2.0 FIX)
 ;# Variance to prior information of THETAS (NTHPxNTHP=4x4 of them).
 $THETAPV BLOCK(4)
 10000 FIX
 0.00 10000
 0.00  0.00 10000
 0.00  0.00 0.0 10000

DISCUSSION

These are called the informative forms of the $THETA record, for use with the NWPRI utility.

$THETAP gives prior information for elements of the THETA matrix.

$THETAPV gives variance information for THETA priors.

The name of the record describes the kind of information it gives, rather than the structure of the information. E.g., in the example above, $THETAPV is implemented in FCON with an $OMEGA record because it is in general an array of values. These records may be located anywhere in the control stream. NM-TRAN inserts the corresponding records in the control stream in the correct order. When the informative forms are used, the options of $PRIOR NWPRI need not be specified. However, if options are listed in $PRIOR NWPRI, then these values are chosen over what is surmised from the informatively labeled theta/omega/sigma records.

(See NWPRI).

OPTIONS

The option FIXED should be used. Other appropriate options are BLOCK and VALUES.