LDEPDF

LDEPDF (LET)

Library Function

Compute the standard form of the log double exponential (also known as the log Laplace distribution) probability density function.

The standard form of the log double exponential distribution has the following probability density function:

LET <y> = LDEPDF(<x>,<alpha>)
                        <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 log double exponential pdf value is saved;
          <alpha> is a variable, a number, or a parameter that specifies the shape parameter;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

LET A = LDEPDF(3,2)
LET A = LDEPDF(A1,1.5)
LET X2 = LDEPDF(X1,0.5)

The general form of the log double exponential distribution is:

The parameter is a location parameter and the parameter is a positive scale parameter.

None

None

LDECDF	= Compute the double exponential cumulative distribution function.
LDEPPF	= Compute the double exponential percent point function.
DEXPDF	= Compute the double exponential probability density function.
EXPPDF	= Compute the exponential probability density function.
WEIPDF	= Compute the Weibull probability density function.
EV1PDF	= Compute the extreme value type I probability density function.
CHSPDF	= Compute the chi-square probability density function.

"Continuous Univariate Distributions: Volume 2", 2nd Ed., Johnson, Kotz, and Balakrishnan, John Wiley, 1994, page 192.

Distributional Modeling

2001/10

    MULTIPLOT 2 2 
    MULTIPLOT CORNER COORDINATES 5 5 95 95 
    TITLE AUTOMATIC 
    PLOT LDEPDF(X,0.5)  FOR X = 0.01 0.01 5 
    PLOT LDEPDF(X,1)  FOR X = 0.01 0.01 5 
    PLOT LDEPDF(X,2)  FOR X = 0.01 0.01 5 
    PLOT LDEPDF(X,5)  FOR X = 0.01 0.01 5 
    END OF MULTIPLOT