WALHAZ

WALHAZ (LET)

Library Function

Compute the Wald hazard function with shape parameter .

The Wald distribution has the following hazard function:

where is the shape parameter and WALPDF and WALCDF are the probability density and cumulative distribution functions of the Wald distribution function respectively.

LET <y> = WALHAZ(<x>,GAMMA)             <SUBSET/EXCEPT/FOR qualification>
where <x> is a variable or a parameter containing positive values;
              <y> is a variable or a parameter (depending on what <x> is) where the computed Wald hazard values are stored;
              <GAMMA> is a positive number or parameter that specifies the shape parameter;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

LET A = WALHAZ(3,10)
LET A = WALHAZ(A1,10)
LET X2 = WALHAZ(X1,10)

None

None

WALCDF	= Compute the Wald cumulative distribution function.
WALPDF	= Compute the Wald probability density function.
WALPPF	= Compute the Wald percent point function.
WALCHAZ	= Compute the Wald cumulative hazard function.
CHSPDF	= Compute the chi-square probability density function.
FPDF	= Compute the F probability density function.
NORPDF	= Compute the normal probability density function.
TPDF	= Compute the T probability density function.
WEIPDF	= Compute the Weibull probability density function.
FLPDF	= Compute the Fatigue Life probability density function.
IGPDF	= Compute the Inverse Gaussian probability density function.
RIGPDF	= Compute the Reciprocal Inverse Gaussian probability density function.

"Continuous Univariate Distributions: Volume 1", 2nd. Ed., Johnson, Kotz, and Balakrishnan, John Wiley, 1994.

Reliability Analysis

1998/4

TITLE AUTOMATIC 
MULTIPLOT CORNER COORDINATES 5 5 95 95 
MULTIPLOT 2 2 
PLOT WALHAZ(X,1) FOR X = 0.01 0.01 3 AND 
PLOT WALHAZ(X,2) FOR X = 0.5 0.01 2 AND 
PLOT WALHAZ(X,3) FOR X = 0.7 0.01 1.3 AND 
PLOT WALHAZ(X,0.5) FOR X = 0.1 0.01 3 
END OF MULTIPLOT