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Dataplot Vol 2 Vol 1

EXPHAZ

Name:
    EXPHAZ (LET)
Type:
    Library Function
Purpose:
    Compute the exponential hazard function.
Description:
    The standard form of the exponential distribution has the following hazard function:

      h(x) = 1            for x > 0

    That is, the hazard function for the exponential distribution is simply a constant.

Syntax:
    LET <y> = EXPHAZ(<x>,<loc>,<scale>)             <SUBSET/EXCEPT/FOR qualification>
    where <x> is a variable, a number, or a parameter;
                <y> is a variable or a parameter (depending on what <x> is) where the computed exponential hazard value is saved;
                <loc> is a variable, a number, or a parameter that defines the location parameter;
                <scale> is a variable, a number, or a parameter that defines the scale parameter;
    and where the <SUBSET/EXCEPT/FOR qualification> is optional.

    The location and scale parameters are optional.

Examples:
    LET A = EXPHAZ(3)
    LET Y = EXPHAZ(X1)
    LET Y = EXPHAZ(X1,2,5)
Note:
    The general form of the exponential distribution has the following hazard function:

      h(x) = (1/beta)      for x > u,  beta > 0

    where u is a location parameter and beta is a scale parameter.

Default:
    None
Synonyms:
    None
Related Commands:
    EXPCHAZ = Compute the exponential probability density function.
    EXPCDF = Compute the exponential cumulative distribution function.
    EXPPDF = Compute the exponential probability density function.
    EXPPPF = Compute the exponential percent point function.
    WEIHAZ = Compute the Weibull hazard function.
    EV1HAZ = Compute the extreme value type I hazard function.
    EV2HAZ = Compute the extreme value type II hazard function.
    LGNHAZ = Compute the lognormal hazard function.
Reference:
    "Continuous Univariate Distributions--Vol. I", 2nd. Ed., Johnson, Kotz, and Balakrishnan, John Wiley and Sons, 1994.

    "Statistical Distributions", 2nd. Edition, Evans, Hastings, and Peacock, Wiley and Sons, 1993 (chapter 18).

Applications:
    Reliability
Implementation Date:
    1998/5
Program:
    YLIMITS 0 2
    TITLE AUTOMATIC
    PLOT EXPHAZ(X) FOR X = 0.01 0.01 10

    plot generated by sample program

Date created: 6/5/2001
Last updated: 4/4/2003
Please email comments on this WWW page to alan.heckert@nist.gov.