PROFILE

Purpose

Compute nd plot profile likelihood bounds for a specified parameter.

Syntax

PROFILE pnum
{ UPPER | LOWER | BOTH }  { FORCE }
{ STEPSIZE value } { STEPNO  value }

{ PARA } { CONV }
{ NOBOUND  } { NOLIST }  { NOPLOT }  { NOWALD }
 @

Arguments and Subcommands

pnum

The number of the parameter for which a likelihood ratio bound is to be computed.

UPPER

Requests only the upper bound. Once set, this option remains in effect until explicitly changed.

LOWER

Requests only the lower bound. Once set, this option remains in effect until explicitly changed.

BOTH

Requests both the upper and lower bounds. Once set, this option remains in effect until explicitly changed. This is the default.

FORCE

Forces computation of a bound for a fixed parameter. This is useful when the maximum likelihood estimate occurs on a boundary of the parameter space and you want to compute a one-sided bound. For example, in a linear model for the relative risk of the form 1 + ,  must be greater than , where  is the largest value of d. In some cases, the best estimate may be obtained by fitting a model with  fixed at a value near . One can obtain an approximate upper bound using the command PROFILE # FORCE UPPER @.

STEPSIZE

Set a fixed step size for the parameter trial values.  This is rarely used.

STEPNO

Set number of steps for fixed-step-size bounds.

PARA

Display parameter values for each trial value.

NOBOUND

Do not print table of interpolated bounds.  This table is printed by default.

NOPLOT

Do not create profile bound plot. This plot is created by default.

NOWALD

Do not include Wald profile in plot.