SDF Function

Returns a survival function.

Category:	Probability
See:	CDF Function

Syntax

SDF(dist,quantile,parm-1,...,parm-k)

Required Arguments

dist

is a character string that identifies the distribution. Valid distributions are as follows:

Distribution	Argument
Bernoulli	`BERNOULLI`
Beta	`BETA`
Binomial	`BINOMIAL`
Cauchy	`CAUCHY`
Chi-Square	`CHISQUARE`
Exponential	`EXPONENTIAL`
F	`F`
Gamma	`GAMMA`
Generalized Poisson	`GENPOISSON`
Geometric	`GEOMETRIC`
Hypergeometric	`HYPERGEOMETRIC`
Laplace	`LAPLACE`
Logistic	`LOGISTIC`
Lognormal	`LOGNORMAL`
Negative binomial	`NEGBINOMIAL`
Normal	`NORMAL\|GAUSS`
Normal mixture	`NORMALMIX`
Pareto	`PARETO`
Poisson	`POISSON`
T	`T`
Tweedie	`TWEEDIE`
Uniform	`UNIFORM`
Wald (inverse Gaussian)	`WALD\|IGAUSS`
Weibull	`WEIBULL`

Note	Except for T, F, and NORMALMIX, you can minimally identify any distribution by its first four characters.

quantile

is a numeric constant, variable or expression that specifies the value of a random variable.

parm-1,...,parm-k

are optional shape, location, or scale parameters appropriate for the specific distribution.

Details

The SDF function computes the survival function (upper tail) from various continuous and discrete distributions. For more information, see the CDF Function.

Example

The following SAS statements produce these results.

SAS Statement	Result
y=sdf('BERN',0,.25);	0.25
y=sdf('BETA',0.2,3,4);	0.09011
y=sdf('BINOM',4,.5,10);	0.62305
y=sdf('CAUCHY',2);	0.14758
y=sdf('CHISQ',11.264,11);	0.42142
y=sdf('EXPO',1);	0.36788
y=sdf('F',3.32,2,3);	0.17361
y=sdf('GAMMA',1,3);	0.91970
y=sdf('GENPOISSON',.9,1,.7);	0.6321205588
y=sdf('HYPER',2,200,50,10);	0.47633
y=sdf('LAPLACE',1);	0.18394
y=sdf('LOGISTIC',1);	0.26894
y=sdf('LOGNORMAL',1);	0.5
y=sdf('NEGB',1,.5,2);	0.5
y=sdf('NORMAL',1.96);	0.025
y=pdf('NORMALMIX',2.3,3,.33,.33,.34, .5,1.5,2.5,.79,1.6,4.3);	0.2819
y=sdf('PARETO',1,1);	1
y=sdf('POISSON',2,1);	0.08030
y=sdf('T',.9,5);	0.20469
y=sdf('TWEEDIE',.8,5);	0.4082370836
y=sdf('UNIFORM',0.25);	0.75
y=sdf('WALD',1,2);	0.37230
y=sdf('WEIBULL',1,2);	0.36788