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The SEVERITY Procedure

Functional Summary

Table 22.1 summarizes the statements and options that control the SEVERITY procedure.

Table 22.1 SEVERITY Functional Summary

Description

Statement

Option

Statements

   

Specifies BY-group processing

BY

 

Specifies the variables to model

MODEL

 

Specifies a model to fit

DIST

 

Specifies optimization options

NLOPTIONS

 

Data Set Options

   

Specifies the input data set

PROC SEVERITY

DATA=

Specifies the output data set for parameter estimates

PROC SEVERITY

OUTEST=

Specifies that the OUTEST= data set contain covariance estimates

PROC SEVERITY

COVOUT

Specifies the output data set for statistics of fit

PROC SEVERITY

OUTSTAT=

Specifies the output data set for CDF estimates

PROC SEVERITY

OUTCDF=

Specifies the output data set for model information

PROC SEVERITY

OUTMODELINFO=

Specifies the input data set for parameter estimates

PROC SEVERITY

INEST=

Data Interpretation Options

   

Specifies right-censoring

MODEL

RIGHTCENSORED=

Specifies left-truncation

MODEL

LEFTTRUNCATED=

Specifies the probability of observability

MODEL

PROBOBSERVED=

Model Estimation Options

   

Specifies the model selection criterion

MODEL

CRITERION=

Specifies initial values for model parameters

DIST

INIT=

Specifies the denominator for computing covariance estimates

PROC SEVERITY

VARDEF=

Nonparametric CDF Estimation Options

   

Specifies the nonparametric method of CDF estimation

MODEL

EMPIRICALCDF=

Specifies the absolute lower bound on risk set size when EMPIRICALCDF=MODIFIEDKM is specified

MODEL

RSLB=

Specifies the value for the lower bound on risk set size when EMPIRICALCDF=MODIFIEDKM is specified

MODEL

C=

Specifies the value for the lower bound on risk set size when EMPIRICALCDF=MODIFIEDKM is specified

MODEL

ALPHA=

Displayed Output and Plotting Options

   

Specifies that all displayed and graphical output be turned off

PROC SEVERITY

NOPRINT

Specifies the output to be displayed

PROC SEVERITY

PRINT=

Specifies that only the specified output be displayed

PROC SEVERITY

ONLY

Specifies the graphical output to be displayed

PROC SEVERITY

PLOTS=

Specifies that only the specified plots be prepared

PROC SEVERITY

ONLY

Specifies that censored observations be marked in appropriate plots

PROC SEVERITY

MARKCENSORED

Specifies that truncated observations be marked in appropriate plots

PROC SEVERITY

MARKTRUNCATED

Specifies that histogram estimates be included in PDF plots

PROC SEVERITY

HISTOGRAM

Specifies that kernel estimates be included in PDF plots

PROC SEVERITY

KERNEL


Note: This procedure is experimental.

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