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Dataplot Vol 2 Vol 1

LOGCHAZ

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

      H(x) = LOG(1 + EXP(-x))
Syntax:
    LET <y> = LOGCHAZ(<x>)             <SUBSET/EXCEPT/FOR qualification>
    where <x> is a variable or a parameter;
                <y> is a variable or a parameter (depending on what <x> is) where the computed logistic cumulative hazard value is stored;
    and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
    LET A = LOGCHAZ(3)
    LET X2 = LOGCHAZ(X1)
Default:
    None
Synonyms:
    None
Related Commands:
    LOGCDF = Compute the logistic cumulative distribution function.
    LOGHAZ = Compute the logistic hazard function.
    LOGPDF = Compute the logistic probability density function.
    LOGPPF = Compute the logistic percent point function.
    NORPDF = Compute the normal probability density function.
    LGNPDF = Compute the logmormal probability density function.
    EXPPDF = Compute the exponential probability density function.
Reference:
    "Continuous Univariate Distributions - Volume 2", Johnson, Kotz, and Balakrisnan, Wiley, 1994, chapter 23.

    "Statistical Distributions", Third Edition, Evans, Hastings, and Peacock, Wiley, 2000, pp. 124-128.

Applications:
    Distributional Modeling
Implementation Date:
    2003/10
Program:
     
    XLIMITS -5 5
    XTIC OFFSET 0.5 0.5
    TITLE AUTOMATIC
    PLOT LOGCHAZ(X) FOR X = -5 0.01 5
        
    plot generated by sample program

Date created: 2/3/2004
Last updated: 2/3/2004
Please email comments on this WWW page to alan.heckert@nist.gov.