ProportionalHazardsStratumRatio Property |
The ratio at which a stratum is split into two strata.
Namespace: Imsl.StatAssembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0
Syntax public virtual double StratumRatio { get; set; }
Public Overridable Property StratumRatio As Double
Get
Set
public:
virtual property double StratumRatio {
double get ();
void set (double value);
}
abstract StratumRatio : float with get, set
override StratumRatio : float with get, set
Property Value
Type:
Double A
double specifying the ratio at which
a stratum is split into two strata.
Default: StratumRatio = 1000.
Remarks
Let
be
the observation proportionality constant, where
is the design row vector for the
k-th observation
and
is the optional fixed
parameter specified by
.
Let
be the minimum value
in a
stratum, where, for failed observations, the minimum is
over all times less than or equal to the time of occurrence
of the
k-th observation. Let
be the maximum value of
for the
remaining observations in the group. Then, if
value,
the observations in the group are divided into two groups
at
k. Set
StratumRatio = -1 if no division into strata is to be made.
See Also