LGNCHAZ

LGNCHAZ (LET)

Library Function

Compute the lognormal cumulative hazard function.

The lognormal distribution has the following cumulative hazard function:

where is the shape parameter.

LET <y2> = LGNCHAZ(<y1>,<s>,<loc>,<scale>)             <SUBSET/EXCEPT/FOR qualification>
where <y1> is a non-negative number, parameter, or variable;
            <s> is an optional positive number, parameter, or variable that specifies the shape parameter;
            <loc> is an optional number, parameter, or variable that specifies the location parameter;
            <scale> is an optional number, parameter, or variable that specifies the shape parameter;
            <y2> is a variable or a parameter (depending on what <y1> is) where the computed lognormal cumulative hazard value is stored;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

LET A = LGNCHAZ(3)
LET X2 = LGNCHAZ(X1)
LET X2 = LGNCHAZ(X1,0.5)
LET X2 = LGNCHAZ(X1,0.5,10,50)

A variable X is log-normally distributed if the variable Y=LOG(X) is normally distributed.

None

None

LGNHAZ	= Compute the lognormal hazard function.
LGNPDF	= Compute the lognormal probability density function.
WEIHAZ	= Compute the Weibull hazard function.
EXPHAZ	= Compute the exponential hazard function.
NORHAZ	= Compute the normal hazard function.
PLNHAZ	= Compute the power-lognormal hazard function.

"Continuous Univariate Distributions: Volume 1", Johnson, Kotz, and Balakrishnin, John Wiley and Sons, 1994.

Reliability

1998/5

TITLE AUTOMATIC
PLOT LGNCHAZ(X) FOR X = 0.01 0.01 10.0